Unlock hubs in 94 Cherokee
 

I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
part-time 4WD tranny. The previous owner told me that you needed to
back it up to unlock the hubs after having it in 4WD. I had to do this
for my 88 Trooper. But I haven't seen anything in the Jeep owner's
manual about backing up to unlock the hubs.

Do I need to back to unlock hubs, or not?

thanks,

Tom

Re: Unlock hubs in 94 Cherokee
 

These hubs don't "unlock". That's unless you've added aftermarket hubs. The
backing up part is what you need to do if the shifter is stuck do to driving
on a dry hard road and binding up the drive line. Earlier XJ's had a vacum
operated unlock on the right axel but that was discontinued before yours was
made (90 I think).

JoBo
<tfwilliams@gmail.com> wrote in message
news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
>I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

These hubs don't "unlock". That's unless you've added aftermarket hubs. The
backing up part is what you need to do if the shifter is stuck do to driving
on a dry hard road and binding up the drive line. Earlier XJ's had a vacum
operated unlock on the right axel but that was discontinued before yours was
made (90 I think).

JoBo
<tfwilliams@gmail.com> wrote in message
news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
>I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

These hubs don't "unlock". That's unless you've added aftermarket hubs. The
backing up part is what you need to do if the shifter is stuck do to driving
on a dry hard road and binding up the drive line. Earlier XJ's had a vacum
operated unlock on the right axel but that was discontinued before yours was
made (90 I think).

JoBo
<tfwilliams@gmail.com> wrote in message
news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
>I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

You have permanently locked hubs, the previous owner obviously had no
clue how to use the 4x4.

You can shift on the fly into and out of 4 high at any legal speed on a
Jeep. I just treat 4 H like any other shift and when I see a snow patch
coming, I shift in, get back to dry and just shift back to 2x4.

When using 4 low for high torque and low speeds, you should be moving
2-3 mph only when shifting into or out of it or you will get bad
noises. It clunks at the best of times going into low though.

Even with the older vacuum axled hubs, you didn't have to back up to
unlock them. You sometimes have to let off on the gas pedal fast to
bump the vacuum up to get them to work, but that is just because of old
age and leaky vacuum hoses. If the shifter will physically shift to 2
wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
the front driveshaft from the engine.

On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
of 4x4 low. The shifter itself won't move sometimes unless I spin
rubber or goose it in reverse. This only happens after coming off a too
high a traction area just before wanting to use 2x4 again.

So if the shifter won't move, you have to hit reverse sometimes or spin
rubber, but the hubs don't care one way or the other.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

tfwilliams@gmail.com wrote:
>
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom

Re: Unlock hubs in 94 Cherokee
 

You have permanently locked hubs, the previous owner obviously had no
clue how to use the 4x4.

You can shift on the fly into and out of 4 high at any legal speed on a
Jeep. I just treat 4 H like any other shift and when I see a snow patch
coming, I shift in, get back to dry and just shift back to 2x4.

When using 4 low for high torque and low speeds, you should be moving
2-3 mph only when shifting into or out of it or you will get bad
noises. It clunks at the best of times going into low though.

Even with the older vacuum axled hubs, you didn't have to back up to
unlock them. You sometimes have to let off on the gas pedal fast to
bump the vacuum up to get them to work, but that is just because of old
age and leaky vacuum hoses. If the shifter will physically shift to 2
wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
the front driveshaft from the engine.

On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
of 4x4 low. The shifter itself won't move sometimes unless I spin
rubber or goose it in reverse. This only happens after coming off a too
high a traction area just before wanting to use 2x4 again.

So if the shifter won't move, you have to hit reverse sometimes or spin
rubber, but the hubs don't care one way or the other.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

tfwilliams@gmail.com wrote:
>
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom

Re: Unlock hubs in 94 Cherokee
 

You have permanently locked hubs, the previous owner obviously had no
clue how to use the 4x4.

You can shift on the fly into and out of 4 high at any legal speed on a
Jeep. I just treat 4 H like any other shift and when I see a snow patch
coming, I shift in, get back to dry and just shift back to 2x4.

When using 4 low for high torque and low speeds, you should be moving
2-3 mph only when shifting into or out of it or you will get bad
noises. It clunks at the best of times going into low though.

Even with the older vacuum axled hubs, you didn't have to back up to
unlock them. You sometimes have to let off on the gas pedal fast to
bump the vacuum up to get them to work, but that is just because of old
age and leaky vacuum hoses. If the shifter will physically shift to 2
wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
the front driveshaft from the engine.

On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
of 4x4 low. The shifter itself won't move sometimes unless I spin
rubber or goose it in reverse. This only happens after coming off a too
high a traction area just before wanting to use 2x4 again.

So if the shifter won't move, you have to hit reverse sometimes or spin
rubber, but the hubs don't care one way or the other.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

tfwilliams@gmail.com wrote:
>
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom

Re: Unlock hubs in 94 Cherokee
 

My 96 xj has locking hubs, Oh by the way it is a warn conversion.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F2B1B.4FED713A@sympatico.ca...
> You have permanently locked hubs, the previous owner obviously had no
> clue how to use the 4x4.
>
> You can shift on the fly into and out of 4 high at any legal speed on a
> Jeep. I just treat 4 H like any other shift and when I see a snow patch
> coming, I shift in, get back to dry and just shift back to 2x4.
>
> When using 4 low for high torque and low speeds, you should be moving
> 2-3 mph only when shifting into or out of it or you will get bad
> noises. It clunks at the best of times going into low though.
>
> Even with the older vacuum axled hubs, you didn't have to back up to
> unlock them. You sometimes have to let off on the gas pedal fast to
> bump the vacuum up to get them to work, but that is just because of old
> age and leaky vacuum hoses. If the shifter will physically shift to 2
> wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
> the front driveshaft from the engine.
>
> On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
> of 4x4 low. The shifter itself won't move sometimes unless I spin
> rubber or goose it in reverse. This only happens after coming off a too
> high a traction area just before wanting to use 2x4 again.
>
> So if the shifter won't move, you have to hit reverse sometimes or spin
> rubber, but the hubs don't care one way or the other.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> tfwilliams@gmail.com wrote:
>>
>> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
>> part-time 4WD tranny. The previous owner told me that you needed to
>> back it up to unlock the hubs after having it in 4WD. I had to do this
>> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
>> manual about backing up to unlock the hubs.
>>
>> Do I need to back to unlock hubs, or not?
>>
>> thanks,
>>
>> Tom

Re: Unlock hubs in 94 Cherokee
 

My 96 xj has locking hubs, Oh by the way it is a warn conversion.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F2B1B.4FED713A@sympatico.ca...
> You have permanently locked hubs, the previous owner obviously had no
> clue how to use the 4x4.
>
> You can shift on the fly into and out of 4 high at any legal speed on a
> Jeep. I just treat 4 H like any other shift and when I see a snow patch
> coming, I shift in, get back to dry and just shift back to 2x4.
>
> When using 4 low for high torque and low speeds, you should be moving
> 2-3 mph only when shifting into or out of it or you will get bad
> noises. It clunks at the best of times going into low though.
>
> Even with the older vacuum axled hubs, you didn't have to back up to
> unlock them. You sometimes have to let off on the gas pedal fast to
> bump the vacuum up to get them to work, but that is just because of old
> age and leaky vacuum hoses. If the shifter will physically shift to 2
> wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
> the front driveshaft from the engine.
>
> On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
> of 4x4 low. The shifter itself won't move sometimes unless I spin
> rubber or goose it in reverse. This only happens after coming off a too
> high a traction area just before wanting to use 2x4 again.
>
> So if the shifter won't move, you have to hit reverse sometimes or spin
> rubber, but the hubs don't care one way or the other.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> tfwilliams@gmail.com wrote:
>>
>> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
>> part-time 4WD tranny. The previous owner told me that you needed to
>> back it up to unlock the hubs after having it in 4WD. I had to do this
>> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
>> manual about backing up to unlock the hubs.
>>
>> Do I need to back to unlock hubs, or not?
>>
>> thanks,
>>
>> Tom

Re: Unlock hubs in 94 Cherokee
 

My 96 xj has locking hubs, Oh by the way it is a warn conversion.
"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F2B1B.4FED713A@sympatico.ca...
> You have permanently locked hubs, the previous owner obviously had no
> clue how to use the 4x4.
>
> You can shift on the fly into and out of 4 high at any legal speed on a
> Jeep. I just treat 4 H like any other shift and when I see a snow patch
> coming, I shift in, get back to dry and just shift back to 2x4.
>
> When using 4 low for high torque and low speeds, you should be moving
> 2-3 mph only when shifting into or out of it or you will get bad
> noises. It clunks at the best of times going into low though.
>
> Even with the older vacuum axled hubs, you didn't have to back up to
> unlock them. You sometimes have to let off on the gas pedal fast to
> bump the vacuum up to get them to work, but that is just because of old
> age and leaky vacuum hoses. If the shifter will physically shift to 2
> wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
> the front driveshaft from the engine.
>
> On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
> of 4x4 low. The shifter itself won't move sometimes unless I spin
> rubber or goose it in reverse. This only happens after coming off a too
> high a traction area just before wanting to use 2x4 again.
>
> So if the shifter won't move, you have to hit reverse sometimes or spin
> rubber, but the hubs don't care one way or the other.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> tfwilliams@gmail.com wrote:
>>
>> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
>> part-time 4WD tranny. The previous owner told me that you needed to
>> back it up to unlock the hubs after having it in 4WD. I had to do this
>> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
>> manual about backing up to unlock the hubs.
>>
>> Do I need to back to unlock hubs, or not?
>>
>> thanks,
>>
>> Tom

Re: Unlock hubs in 94 Cherokee
 

Your point?

Do locking hubs magically prevent you from shifting out of 4x4 like the
OP was told?

Mike


The Fuzz wrote:
>
> My 96 xj has locking hubs, Oh by the way it is a warn conversion.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:421F2B1B.4FED713A@sympatico.ca...
> > You have permanently locked hubs, the previous owner obviously had no
> > clue how to use the 4x4.
> >
> > You can shift on the fly into and out of 4 high at any legal speed on a
> > Jeep. I just treat 4 H like any other shift and when I see a snow patch
> > coming, I shift in, get back to dry and just shift back to 2x4.
> >
> > When using 4 low for high torque and low speeds, you should be moving
> > 2-3 mph only when shifting into or out of it or you will get bad
> > noises. It clunks at the best of times going into low though.
> >
> > Even with the older vacuum axled hubs, you didn't have to back up to
> > unlock them. You sometimes have to let off on the gas pedal fast to
> > bump the vacuum up to get them to work, but that is just because of old
> > age and leaky vacuum hoses. If the shifter will physically shift to 2
> > wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
> > the front driveshaft from the engine.
> >
> > On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
> > of 4x4 low. The shifter itself won't move sometimes unless I spin
> > rubber or goose it in reverse. This only happens after coming off a too
> > high a traction area just before wanting to use 2x4 again.
> >
> > So if the shifter won't move, you have to hit reverse sometimes or spin
> > rubber, but the hubs don't care one way or the other.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > tfwilliams@gmail.com wrote:
> >>
> >> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> >> part-time 4WD tranny. The previous owner told me that you needed to
> >> back it up to unlock the hubs after having it in 4WD. I had to do this
> >> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> >> manual about backing up to unlock the hubs.
> >>
> >> Do I need to back to unlock hubs, or not?
> >>
> >> thanks,
> >>
> >> Tom

Re: Unlock hubs in 94 Cherokee
 

Your point?

Do locking hubs magically prevent you from shifting out of 4x4 like the
OP was told?

Mike


The Fuzz wrote:
>
> My 96 xj has locking hubs, Oh by the way it is a warn conversion.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:421F2B1B.4FED713A@sympatico.ca...
> > You have permanently locked hubs, the previous owner obviously had no
> > clue how to use the 4x4.
> >
> > You can shift on the fly into and out of 4 high at any legal speed on a
> > Jeep. I just treat 4 H like any other shift and when I see a snow patch
> > coming, I shift in, get back to dry and just shift back to 2x4.
> >
> > When using 4 low for high torque and low speeds, you should be moving
> > 2-3 mph only when shifting into or out of it or you will get bad
> > noises. It clunks at the best of times going into low though.
> >
> > Even with the older vacuum axled hubs, you didn't have to back up to
> > unlock them. You sometimes have to let off on the gas pedal fast to
> > bump the vacuum up to get them to work, but that is just because of old
> > age and leaky vacuum hoses. If the shifter will physically shift to 2
> > wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
> > the front driveshaft from the engine.
> >
> > On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
> > of 4x4 low. The shifter itself won't move sometimes unless I spin
> > rubber or goose it in reverse. This only happens after coming off a too
> > high a traction area just before wanting to use 2x4 again.
> >
> > So if the shifter won't move, you have to hit reverse sometimes or spin
> > rubber, but the hubs don't care one way or the other.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > tfwilliams@gmail.com wrote:
> >>
> >> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> >> part-time 4WD tranny. The previous owner told me that you needed to
> >> back it up to unlock the hubs after having it in 4WD. I had to do this
> >> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> >> manual about backing up to unlock the hubs.
> >>
> >> Do I need to back to unlock hubs, or not?
> >>
> >> thanks,
> >>
> >> Tom

Re: Unlock hubs in 94 Cherokee
 

Your point?

Do locking hubs magically prevent you from shifting out of 4x4 like the
OP was told?

Mike


The Fuzz wrote:
>
> My 96 xj has locking hubs, Oh by the way it is a warn conversion.
> "Mike Romain" <romainm@sympatico.ca> wrote in message
> news:421F2B1B.4FED713A@sympatico.ca...
> > You have permanently locked hubs, the previous owner obviously had no
> > clue how to use the 4x4.
> >
> > You can shift on the fly into and out of 4 high at any legal speed on a
> > Jeep. I just treat 4 H like any other shift and when I see a snow patch
> > coming, I shift in, get back to dry and just shift back to 2x4.
> >
> > When using 4 low for high torque and low speeds, you should be moving
> > 2-3 mph only when shifting into or out of it or you will get bad
> > noises. It clunks at the best of times going into low though.
> >
> > Even with the older vacuum axled hubs, you didn't have to back up to
> > unlock them. You sometimes have to let off on the gas pedal fast to
> > bump the vacuum up to get them to work, but that is just because of old
> > age and leaky vacuum hoses. If the shifter will physically shift to 2
> > wheel drive, you 'are' in 2 wheel drive period. The shifter disconnects
> > the front driveshaft from the engine.
> >
> > On my 86 CJ7 with locking hubs, I sometimes have issues getting it out
> > of 4x4 low. The shifter itself won't move sometimes unless I spin
> > rubber or goose it in reverse. This only happens after coming off a too
> > high a traction area just before wanting to use 2x4 again.
> >
> > So if the shifter won't move, you have to hit reverse sometimes or spin
> > rubber, but the hubs don't care one way or the other.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > tfwilliams@gmail.com wrote:
> >>
> >> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> >> part-time 4WD tranny. The previous owner told me that you needed to
> >> back it up to unlock the hubs after having it in 4WD. I had to do this
> >> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> >> manual about backing up to unlock the hubs.
> >>
> >> Do I need to back to unlock hubs, or not?
> >>
> >> thanks,
> >>
> >> Tom

Re: Unlock hubs in 94 Cherokee
 

The previous owner meant to back up while you are shifting out of
four wheel drive. A must with old Ford products as the the Dana and nine
inch ratios don't exactly match, not as important with Jeeps, unless
there is a tire size or pressure difference. But, it a good practice to
get into.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

tfwilliams@gmail.com wrote:
>
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom

Re: Unlock hubs in 94 Cherokee
 

The previous owner meant to back up while you are shifting out of
four wheel drive. A must with old Ford products as the the Dana and nine
inch ratios don't exactly match, not as important with Jeeps, unless
there is a tire size or pressure difference. But, it a good practice to
get into.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

tfwilliams@gmail.com wrote:
>
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom

Re: Unlock hubs in 94 Cherokee
 

The previous owner meant to back up while you are shifting out of
four wheel drive. A must with old Ford products as the the Dana and nine
inch ratios don't exactly match, not as important with Jeeps, unless
there is a tire size or pressure difference. But, it a good practice to
get into.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

tfwilliams@gmail.com wrote:
>
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom

Re: Unlock hubs in 94 Cherokee
 

Crap Bill, I can just see someone doing 65 mph and in order to shift
having to stop on the highway and go backward against 70 mph traffic to
shift to 2WD. LOL! Too funny....

Mike

"L.W.(ßill) ------ III" wrote:
>
> The previous owner meant to back up while you are shifting out of
> four wheel drive. A must with old Ford products as the the Dana and nine
> inch ratios don't exactly match, not as important with Jeeps, unless
> there is a tire size or pressure difference. But, it a good practice to
> get into.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> tfwilliams@gmail.com wrote:
> >
> > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > part-time 4WD tranny. The previous owner told me that you needed to
> > back it up to unlock the hubs after having it in 4WD. I had to do this
> > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > manual about backing up to unlock the hubs.
> >
> > Do I need to back to unlock hubs, or not?
> >
> > thanks,
> >
> > Tom

Re: Unlock hubs in 94 Cherokee
 

Crap Bill, I can just see someone doing 65 mph and in order to shift
having to stop on the highway and go backward against 70 mph traffic to
shift to 2WD. LOL! Too funny....

Mike

"L.W.(ßill) ------ III" wrote:
>
> The previous owner meant to back up while you are shifting out of
> four wheel drive. A must with old Ford products as the the Dana and nine
> inch ratios don't exactly match, not as important with Jeeps, unless
> there is a tire size or pressure difference. But, it a good practice to
> get into.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> tfwilliams@gmail.com wrote:
> >
> > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > part-time 4WD tranny. The previous owner told me that you needed to
> > back it up to unlock the hubs after having it in 4WD. I had to do this
> > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > manual about backing up to unlock the hubs.
> >
> > Do I need to back to unlock hubs, or not?
> >
> > thanks,
> >
> > Tom

Re: Unlock hubs in 94 Cherokee
 

Crap Bill, I can just see someone doing 65 mph and in order to shift
having to stop on the highway and go backward against 70 mph traffic to
shift to 2WD. LOL! Too funny....

Mike

"L.W.(ßill) ------ III" wrote:
>
> The previous owner meant to back up while you are shifting out of
> four wheel drive. A must with old Ford products as the the Dana and nine
> inch ratios don't exactly match, not as important with Jeeps, unless
> there is a tire size or pressure difference. But, it a good practice to
> get into.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> tfwilliams@gmail.com wrote:
> >
> > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > part-time 4WD tranny. The previous owner told me that you needed to
> > back it up to unlock the hubs after having it in 4WD. I had to do this
> > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > manual about backing up to unlock the hubs.
> >
> > Do I need to back to unlock hubs, or not?
> >
> > thanks,
> >
> > Tom

Re: Unlock hubs in 94 Cherokee
 

The hubs lock through a vacuum mechanism. There is a collar of sorts that
slides over two splined shafts to connect them, this collar moves on command
of a vacuum system. Sometimes the shafts and collar can bind, and going in
reverse will release the bind and allow the collar to move back to its home
position. This is not in the manual because it is not "required". It is
helpful though. You can also release the binding, if present, by changing
the load on the drive train, you can do this by letting off of the gas and
turning the steering wheel from side to side.

If you shift out of 4WD, and can hear the resulting clunk from the movement
of the collar, then you do not have to do anything else. In theory, all you
need do is shift out of 4WD, and eventually the vacuum system will pull the
collar back to its home position. In practice, the collar can stick and the
remedy is to try going backwards for a few feet.



<tfwilliams@gmail.com> wrote in message
news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

The hubs lock through a vacuum mechanism. There is a collar of sorts that
slides over two splined shafts to connect them, this collar moves on command
of a vacuum system. Sometimes the shafts and collar can bind, and going in
reverse will release the bind and allow the collar to move back to its home
position. This is not in the manual because it is not "required". It is
helpful though. You can also release the binding, if present, by changing
the load on the drive train, you can do this by letting off of the gas and
turning the steering wheel from side to side.

If you shift out of 4WD, and can hear the resulting clunk from the movement
of the collar, then you do not have to do anything else. In theory, all you
need do is shift out of 4WD, and eventually the vacuum system will pull the
collar back to its home position. In practice, the collar can stick and the
remedy is to try going backwards for a few feet.



<tfwilliams@gmail.com> wrote in message
news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

The hubs lock through a vacuum mechanism. There is a collar of sorts that
slides over two splined shafts to connect them, this collar moves on command
of a vacuum system. Sometimes the shafts and collar can bind, and going in
reverse will release the bind and allow the collar to move back to its home
position. This is not in the manual because it is not "required". It is
helpful though. You can also release the binding, if present, by changing
the load on the drive train, you can do this by letting off of the gas and
turning the steering wheel from side to side.

If you shift out of 4WD, and can hear the resulting clunk from the movement
of the collar, then you do not have to do anything else. In theory, all you
need do is shift out of 4WD, and eventually the vacuum system will pull the
collar back to its home position. In practice, the collar can stick and the
remedy is to try going backwards for a few feet.



<tfwilliams@gmail.com> wrote in message
news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

He doesn't have a locking front end, it is on all the time.

Even with the old vacuum lock, shifting is by a lever on the floor. If
this lever on the floor will shift to 2 wheel drive, you are freaking
'IN' 2 wheel drive no matter if the front axle is a vacuum release,
permanent locked, or manually locked!

There is no such thing as having to go into reverse to 'unlock' front
hubs or axles period! That cannot happen on "ANY" Jeep!

Once the shifter has moved to 2 wheel drive, the front driveshaft is no
longer connected to the drivetrain, therefore there can be no 'binding
up'. The older vacuum collar cannot 'bind up' when the driveshaft is
not connected....

Now if your gear shift won't come out of 4x4, then yes, you do have to
maybe back up to shift the transfer case.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jeff Strickland wrote:
>
> The hubs lock through a vacuum mechanism. There is a collar of sorts that
> slides over two splined shafts to connect them, this collar moves on command
> of a vacuum system. Sometimes the shafts and collar can bind, and going in
> reverse will release the bind and allow the collar to move back to its home
> position. This is not in the manual because it is not "required". It is
> helpful though. You can also release the binding, if present, by changing
> the load on the drive train, you can do this by letting off of the gas and
> turning the steering wheel from side to side.
>
> If you shift out of 4WD, and can hear the resulting clunk from the movement
> of the collar, then you do not have to do anything else. In theory, all you
> need do is shift out of 4WD, and eventually the vacuum system will pull the
> collar back to its home position. In practice, the collar can stick and the
> remedy is to try going backwards for a few feet.
>
> <tfwilliams@gmail.com> wrote in message
> news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > part-time 4WD tranny. The previous owner told me that you needed to
> > back it up to unlock the hubs after having it in 4WD. I had to do this
> > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > manual about backing up to unlock the hubs.
> >
> > Do I need to back to unlock hubs, or not?
> >
> > thanks,
> >
> > Tom
> >

Re: Unlock hubs in 94 Cherokee
 

He doesn't have a locking front end, it is on all the time.

Even with the old vacuum lock, shifting is by a lever on the floor. If
this lever on the floor will shift to 2 wheel drive, you are freaking
'IN' 2 wheel drive no matter if the front axle is a vacuum release,
permanent locked, or manually locked!

There is no such thing as having to go into reverse to 'unlock' front
hubs or axles period! That cannot happen on "ANY" Jeep!

Once the shifter has moved to 2 wheel drive, the front driveshaft is no
longer connected to the drivetrain, therefore there can be no 'binding
up'. The older vacuum collar cannot 'bind up' when the driveshaft is
not connected....

Now if your gear shift won't come out of 4x4, then yes, you do have to
maybe back up to shift the transfer case.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jeff Strickland wrote:
>
> The hubs lock through a vacuum mechanism. There is a collar of sorts that
> slides over two splined shafts to connect them, this collar moves on command
> of a vacuum system. Sometimes the shafts and collar can bind, and going in
> reverse will release the bind and allow the collar to move back to its home
> position. This is not in the manual because it is not "required". It is
> helpful though. You can also release the binding, if present, by changing
> the load on the drive train, you can do this by letting off of the gas and
> turning the steering wheel from side to side.
>
> If you shift out of 4WD, and can hear the resulting clunk from the movement
> of the collar, then you do not have to do anything else. In theory, all you
> need do is shift out of 4WD, and eventually the vacuum system will pull the
> collar back to its home position. In practice, the collar can stick and the
> remedy is to try going backwards for a few feet.
>
> <tfwilliams@gmail.com> wrote in message
> news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > part-time 4WD tranny. The previous owner told me that you needed to
> > back it up to unlock the hubs after having it in 4WD. I had to do this
> > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > manual about backing up to unlock the hubs.
> >
> > Do I need to back to unlock hubs, or not?
> >
> > thanks,
> >
> > Tom
> >

Re: Unlock hubs in 94 Cherokee
 

He doesn't have a locking front end, it is on all the time.

Even with the old vacuum lock, shifting is by a lever on the floor. If
this lever on the floor will shift to 2 wheel drive, you are freaking
'IN' 2 wheel drive no matter if the front axle is a vacuum release,
permanent locked, or manually locked!

There is no such thing as having to go into reverse to 'unlock' front
hubs or axles period! That cannot happen on "ANY" Jeep!

Once the shifter has moved to 2 wheel drive, the front driveshaft is no
longer connected to the drivetrain, therefore there can be no 'binding
up'. The older vacuum collar cannot 'bind up' when the driveshaft is
not connected....

Now if your gear shift won't come out of 4x4, then yes, you do have to
maybe back up to shift the transfer case.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Jeff Strickland wrote:
>
> The hubs lock through a vacuum mechanism. There is a collar of sorts that
> slides over two splined shafts to connect them, this collar moves on command
> of a vacuum system. Sometimes the shafts and collar can bind, and going in
> reverse will release the bind and allow the collar to move back to its home
> position. This is not in the manual because it is not "required". It is
> helpful though. You can also release the binding, if present, by changing
> the load on the drive train, you can do this by letting off of the gas and
> turning the steering wheel from side to side.
>
> If you shift out of 4WD, and can hear the resulting clunk from the movement
> of the collar, then you do not have to do anything else. In theory, all you
> need do is shift out of 4WD, and eventually the vacuum system will pull the
> collar back to its home position. In practice, the collar can stick and the
> remedy is to try going backwards for a few feet.
>
> <tfwilliams@gmail.com> wrote in message
> news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > part-time 4WD tranny. The previous owner told me that you needed to
> > back it up to unlock the hubs after having it in 4WD. I had to do this
> > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > manual about backing up to unlock the hubs.
> >
> > Do I need to back to unlock hubs, or not?
> >
> > thanks,
> >
> > Tom
> >

Re: Unlock hubs in 94 Cherokee
 

Incorrect. You won't find the vacuum disconnect axle on a 1994 Cherokee.
Last model year for that was 1991 for XJ/MJ and 1995 for YJ. The hubs on
a 94 Cherokee are permanently connected straight through the axles to
the differential.

Steve
http://xjeep.dyndns.org


Jeff Strickland wrote:
>
> The hubs lock through a vacuum mechanism.
>
> <tfwilliams@gmail.com> wrote in message
> news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
>
>>I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
>>part-time 4WD tranny. The previous owner told me that you needed to
>>back it up to unlock the hubs after having it in 4WD. I had to do this
>>for my 88 Trooper. But I haven't seen anything in the Jeep owner's
>>manual about backing up to unlock the hubs.
>>
>>Do I need to back to unlock hubs, or not?

Re: Unlock hubs in 94 Cherokee
 

Incorrect. You won't find the vacuum disconnect axle on a 1994 Cherokee.
Last model year for that was 1991 for XJ/MJ and 1995 for YJ. The hubs on
a 94 Cherokee are permanently connected straight through the axles to
the differential.

Steve
http://xjeep.dyndns.org


Jeff Strickland wrote:
>
> The hubs lock through a vacuum mechanism.
>
> <tfwilliams@gmail.com> wrote in message
> news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
>
>>I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
>>part-time 4WD tranny. The previous owner told me that you needed to
>>back it up to unlock the hubs after having it in 4WD. I had to do this
>>for my 88 Trooper. But I haven't seen anything in the Jeep owner's
>>manual about backing up to unlock the hubs.
>>
>>Do I need to back to unlock hubs, or not?

Re: Unlock hubs in 94 Cherokee
 

Incorrect. You won't find the vacuum disconnect axle on a 1994 Cherokee.
Last model year for that was 1991 for XJ/MJ and 1995 for YJ. The hubs on
a 94 Cherokee are permanently connected straight through the axles to
the differential.

Steve
http://xjeep.dyndns.org


Jeff Strickland wrote:
>
> The hubs lock through a vacuum mechanism.
>
> <tfwilliams@gmail.com> wrote in message
> news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
>
>>I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
>>part-time 4WD tranny. The previous owner told me that you needed to
>>back it up to unlock the hubs after having it in 4WD. I had to do this
>>for my 88 Trooper. But I haven't seen anything in the Jeep owner's
>>manual about backing up to unlock the hubs.
>>
>>Do I need to back to unlock hubs, or not?

Re: Unlock hubs in 94 Cherokee
 

I've never used four wheel drive on a highway.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Crap Bill, I can just see someone doing 65 mph and in order to shift
> having to stop on the highway and go backward against 70 mph traffic to
> shift to 2WD. LOL! Too funny....
>
> Mike

Re: Unlock hubs in 94 Cherokee
 

I've never used four wheel drive on a highway.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Crap Bill, I can just see someone doing 65 mph and in order to shift
> having to stop on the highway and go backward against 70 mph traffic to
> shift to 2WD. LOL! Too funny....
>
> Mike

Re: Unlock hubs in 94 Cherokee
 

I've never used four wheel drive on a highway.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Crap Bill, I can just see someone doing 65 mph and in order to shift
> having to stop on the highway and go backward against 70 mph traffic to
> shift to 2WD. LOL! Too funny....
>
> Mike

Re: Unlock hubs in 94 Cherokee
 

Lucky you.....

We need it on the highway up here which is when the Jeep 'shift on the
fly' system is so nice.

Mike

"L.W.(ßill) ------ III" wrote:
>
> I've never used four wheel drive on a highway.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > Crap Bill, I can just see someone doing 65 mph and in order to shift
> > having to stop on the highway and go backward against 70 mph traffic to
> > shift to 2WD. LOL! Too funny....
> >
> > Mike

Re: Unlock hubs in 94 Cherokee
 

Lucky you.....

We need it on the highway up here which is when the Jeep 'shift on the
fly' system is so nice.

Mike

"L.W.(ßill) ------ III" wrote:
>
> I've never used four wheel drive on a highway.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > Crap Bill, I can just see someone doing 65 mph and in order to shift
> > having to stop on the highway and go backward against 70 mph traffic to
> > shift to 2WD. LOL! Too funny....
> >
> > Mike

Re: Unlock hubs in 94 Cherokee
 

Lucky you.....

We need it on the highway up here which is when the Jeep 'shift on the
fly' system is so nice.

Mike

"L.W.(ßill) ------ III" wrote:
>
> I've never used four wheel drive on a highway.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Mike Romain wrote:
> >
> > Crap Bill, I can just see someone doing 65 mph and in order to shift
> > having to stop on the highway and go backward against 70 mph traffic to
> > shift to 2WD. LOL! Too funny....
> >
> > Mike

Re: Unlock hubs in 94 Cherokee
 

This has nothing to do with the hubs. On an older transfer case the
slider that engages and disengages 4wd can get a little roughed up. In
this case disengaging while driving can be a little noisy, especially if
you have some windup due to tire pressures being off so that the
effective diameters of the tires are different. Stopping and reversing
unloads the coupling allowing it to disengage smoothly.

tfwilliams@gmail.com wrote:

> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

This has nothing to do with the hubs. On an older transfer case the
slider that engages and disengages 4wd can get a little roughed up. In
this case disengaging while driving can be a little noisy, especially if
you have some windup due to tire pressures being off so that the
effective diameters of the tires are different. Stopping and reversing
unloads the coupling allowing it to disengage smoothly.

tfwilliams@gmail.com wrote:

> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

This has nothing to do with the hubs. On an older transfer case the
slider that engages and disengages 4wd can get a little roughed up. In
this case disengaging while driving can be a little noisy, especially if
you have some windup due to tire pressures being off so that the
effective diameters of the tires are different. Stopping and reversing
unloads the coupling allowing it to disengage smoothly.

tfwilliams@gmail.com wrote:

> I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> part-time 4WD tranny. The previous owner told me that you needed to
> back it up to unlock the hubs after having it in 4WD. I had to do this
> for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> manual about backing up to unlock the hubs.
>
> Do I need to back to unlock hubs, or not?
>
> thanks,
>
> Tom
>

Re: Unlock hubs in 94 Cherokee
 

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F6844.BCC3559B@sympatico.ca...
> He doesn't have a locking front end, it is on all the time.
>
> Even with the old vacuum lock, shifting is by a lever on the floor. If
> this lever on the floor will shift to 2 wheel drive, you are freaking
> 'IN' 2 wheel drive no matter if the front axle is a vacuum release,
> permanent locked, or manually locked!
>
But Mike, he was told to go in reverse to allow the mechanism to unlock. I
was thinking he has the system like that in the YJ. It turns out he has the
system that is like the TJ.




> There is no such thing as having to go into reverse to 'unlock' front
> hubs or axles period! That cannot happen on "ANY" Jeep!
>

This is not entirely true. Well, it is true in theory. That is there is no
requirement, but we all know that the YJ's front axle can balk at unlocking
when the tcase lever is moved back to 2WD, the work-around for this
balkiness is to back up a few yards.


> Once the shifter has moved to 2 wheel drive, the front driveshaft is no
> longer connected to the drivetrain, therefore there can be no 'binding
> up'. The older vacuum collar cannot 'bind up' when the driveshaft is
> not connected....
>
> Now if your gear shift won't come out of 4x4, then yes, you do have to
> maybe back up to shift the transfer case.
>

I follow that, but what I have always seen is that the collar sticks.
Backing up a little solves this. Having read about the lever binding up, my
CJ has never had this trouble, so I assumed that any binding in a YJ would
be the fork or the collar on the axle.



> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Jeff Strickland wrote:
> >
> > The hubs lock through a vacuum mechanism. There is a collar of sorts
that
> > slides over two splined shafts to connect them, this collar moves on
command
> > of a vacuum system. Sometimes the shafts and collar can bind, and going
in
> > reverse will release the bind and allow the collar to move back to its
home
> > position. This is not in the manual because it is not "required". It is
> > helpful though. You can also release the binding, if present, by
changing
> > the load on the drive train, you can do this by letting off of the gas
and
> > turning the steering wheel from side to side.
> >
> > If you shift out of 4WD, and can hear the resulting clunk from the
movement
> > of the collar, then you do not have to do anything else. In theory, all
you
> > need do is shift out of 4WD, and eventually the vacuum system will pull
the
> > collar back to its home position. In practice, the collar can stick and
the
> > remedy is to try going backwards for a few feet.
> >
> > <tfwilliams@gmail.com> wrote in message
> > news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > > part-time 4WD tranny. The previous owner told me that you needed to
> > > back it up to unlock the hubs after having it in 4WD. I had to do
this
> > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > > manual about backing up to unlock the hubs.
> > >
> > > Do I need to back to unlock hubs, or not?
> > >
> > > thanks,
> > >
> > > Tom
> > >

Re: Unlock hubs in 94 Cherokee
 

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F6844.BCC3559B@sympatico.ca...
> He doesn't have a locking front end, it is on all the time.
>
> Even with the old vacuum lock, shifting is by a lever on the floor. If
> this lever on the floor will shift to 2 wheel drive, you are freaking
> 'IN' 2 wheel drive no matter if the front axle is a vacuum release,
> permanent locked, or manually locked!
>
But Mike, he was told to go in reverse to allow the mechanism to unlock. I
was thinking he has the system like that in the YJ. It turns out he has the
system that is like the TJ.




> There is no such thing as having to go into reverse to 'unlock' front
> hubs or axles period! That cannot happen on "ANY" Jeep!
>

This is not entirely true. Well, it is true in theory. That is there is no
requirement, but we all know that the YJ's front axle can balk at unlocking
when the tcase lever is moved back to 2WD, the work-around for this
balkiness is to back up a few yards.


> Once the shifter has moved to 2 wheel drive, the front driveshaft is no
> longer connected to the drivetrain, therefore there can be no 'binding
> up'. The older vacuum collar cannot 'bind up' when the driveshaft is
> not connected....
>
> Now if your gear shift won't come out of 4x4, then yes, you do have to
> maybe back up to shift the transfer case.
>

I follow that, but what I have always seen is that the collar sticks.
Backing up a little solves this. Having read about the lever binding up, my
CJ has never had this trouble, so I assumed that any binding in a YJ would
be the fork or the collar on the axle.



> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Jeff Strickland wrote:
> >
> > The hubs lock through a vacuum mechanism. There is a collar of sorts
that
> > slides over two splined shafts to connect them, this collar moves on
command
> > of a vacuum system. Sometimes the shafts and collar can bind, and going
in
> > reverse will release the bind and allow the collar to move back to its
home
> > position. This is not in the manual because it is not "required". It is
> > helpful though. You can also release the binding, if present, by
changing
> > the load on the drive train, you can do this by letting off of the gas
and
> > turning the steering wheel from side to side.
> >
> > If you shift out of 4WD, and can hear the resulting clunk from the
movement
> > of the collar, then you do not have to do anything else. In theory, all
you
> > need do is shift out of 4WD, and eventually the vacuum system will pull
the
> > collar back to its home position. In practice, the collar can stick and
the
> > remedy is to try going backwards for a few feet.
> >
> > <tfwilliams@gmail.com> wrote in message
> > news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > > part-time 4WD tranny. The previous owner told me that you needed to
> > > back it up to unlock the hubs after having it in 4WD. I had to do
this
> > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > > manual about backing up to unlock the hubs.
> > >
> > > Do I need to back to unlock hubs, or not?
> > >
> > > thanks,
> > >
> > > Tom
> > >

Re: Unlock hubs in 94 Cherokee
 

"Mike Romain" <romainm@sympatico.ca> wrote in message
news:421F6844.BCC3559B@sympatico.ca...
> He doesn't have a locking front end, it is on all the time.
>
> Even with the old vacuum lock, shifting is by a lever on the floor. If
> this lever on the floor will shift to 2 wheel drive, you are freaking
> 'IN' 2 wheel drive no matter if the front axle is a vacuum release,
> permanent locked, or manually locked!
>
But Mike, he was told to go in reverse to allow the mechanism to unlock. I
was thinking he has the system like that in the YJ. It turns out he has the
system that is like the TJ.




> There is no such thing as having to go into reverse to 'unlock' front
> hubs or axles period! That cannot happen on "ANY" Jeep!
>

This is not entirely true. Well, it is true in theory. That is there is no
requirement, but we all know that the YJ's front axle can balk at unlocking
when the tcase lever is moved back to 2WD, the work-around for this
balkiness is to back up a few yards.


> Once the shifter has moved to 2 wheel drive, the front driveshaft is no
> longer connected to the drivetrain, therefore there can be no 'binding
> up'. The older vacuum collar cannot 'bind up' when the driveshaft is
> not connected....
>
> Now if your gear shift won't come out of 4x4, then yes, you do have to
> maybe back up to shift the transfer case.
>

I follow that, but what I have always seen is that the collar sticks.
Backing up a little solves this. Having read about the lever binding up, my
CJ has never had this trouble, so I assumed that any binding in a YJ would
be the fork or the collar on the axle.



> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
> Jeff Strickland wrote:
> >
> > The hubs lock through a vacuum mechanism. There is a collar of sorts
that
> > slides over two splined shafts to connect them, this collar moves on
command
> > of a vacuum system. Sometimes the shafts and collar can bind, and going
in
> > reverse will release the bind and allow the collar to move back to its
home
> > position. This is not in the manual because it is not "required". It is
> > helpful though. You can also release the binding, if present, by
changing
> > the load on the drive train, you can do this by letting off of the gas
and
> > turning the steering wheel from side to side.
> >
> > If you shift out of 4WD, and can hear the resulting clunk from the
movement
> > of the collar, then you do not have to do anything else. In theory, all
you
> > need do is shift out of 4WD, and eventually the vacuum system will pull
the
> > collar back to its home position. In practice, the collar can stick and
the
> > remedy is to try going backwards for a few feet.
> >
> > <tfwilliams@gmail.com> wrote in message
> > news:1109331862.317898.99190@l41g2000cwc.googlegro ups.com...
> > > I just purchased a 2nd-hand 1994 Cherokee with the 5-speed manual,
> > > part-time 4WD tranny. The previous owner told me that you needed to
> > > back it up to unlock the hubs after having it in 4WD. I had to do
this
> > > for my 88 Trooper. But I haven't seen anything in the Jeep owner's
> > > manual about backing up to unlock the hubs.
> > >
> > > Do I need to back to unlock hubs, or not?
> > >
> > > thanks,
> > >
> > > Tom
> > >