YJ Axle Shift Motor
12-30-2003, 11:23 PM
#21
Guest
Posts: n/a
Re: YJ Axle Shift Motor
Sorry 87 YJ
I actually applied full vacuum to the diaphram tonight and then
reconnected the whole works it seems to have cleared up the wobble to
some degree, I should have also mentioned that I just did a 1" body
lift on the vehicle but I had noticed this the day before I did the
lift but it has happened in the past where it seemed to lock then
release after a bit of driving. The steering is a lot better now but I
still notice that slight resistance on slow tight corners and I'm
suspecting it may have something to do with the lift and the length of
the streering shaft to the power steering pump.
On Wed, 31 Dec 2003 03:40:19 GMT, "GpGeek" <rupel@hawaii.nospamrr.com>
wrote:
>You can pull the vacuum hose plug off of the front axle and then with the
>engine running see if you can tell if one side still has vacuum
>to it. If it does, then place that side onto the opposite fitting from
>where you pulled it off. That should disengage it and hold it there until
>you can check out the entire system. You didn't tell us what type of
>vehicle you have but if it is like mine (91 YJ) then this should work for
>you. My YJ has the switch for the 4WD light on the front axle disconnect so
>it would still be lit up if the front axle is still engaged. Might yours be
>like this also? If so, you have a different problem.
>
>Good luck and Happy New Year!
>Dave
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>| I was posting as Jeepers and just realized that someone else posts
>| here using the same name ( or someone else use to use that name) so
>| you will notice I changed my nick a bit.
>|
>| Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>| and noticed that the front axles are locked in 4wd. The indicator
>| light does not indicate that I'm in 4WD and responds to me shifting in
>| and out of 4WD. From what I have read when I shift to 4WD the transfer
>| case of course shifts the gears and via vacuum it trips a pressure
>| switch to energize the indicator light.....this all seems to be in
>| order. Also I understand it also applys or removes vacuum on the axle
>| shift motor and engages / disengages the front axles.
>|
>| So from this I guess I can assume one of the following:
>|
>| 1:) I have a bad vacuum line
>| 2:) The shift motor diaphram is damaged
>| 3:) The shift linkage from the shift motor is damaged / jammed
>|
>| Is there an easy way to manually disengage this until I get time after
>| NewYears to really look at the problem.
>|
>| Also does it apply vacuum to engage the front axles or remove vacuum?
>|
>|
>
I actually applied full vacuum to the diaphram tonight and then
reconnected the whole works it seems to have cleared up the wobble to
some degree, I should have also mentioned that I just did a 1" body
lift on the vehicle but I had noticed this the day before I did the
lift but it has happened in the past where it seemed to lock then
release after a bit of driving. The steering is a lot better now but I
still notice that slight resistance on slow tight corners and I'm
suspecting it may have something to do with the lift and the length of
the streering shaft to the power steering pump.
On Wed, 31 Dec 2003 03:40:19 GMT, "GpGeek" <rupel@hawaii.nospamrr.com>
wrote:
>You can pull the vacuum hose plug off of the front axle and then with the
>engine running see if you can tell if one side still has vacuum
>to it. If it does, then place that side onto the opposite fitting from
>where you pulled it off. That should disengage it and hold it there until
>you can check out the entire system. You didn't tell us what type of
>vehicle you have but if it is like mine (91 YJ) then this should work for
>you. My YJ has the switch for the 4WD light on the front axle disconnect so
>it would still be lit up if the front axle is still engaged. Might yours be
>like this also? If so, you have a different problem.
>
>Good luck and Happy New Year!
>Dave
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>| I was posting as Jeepers and just realized that someone else posts
>| here using the same name ( or someone else use to use that name) so
>| you will notice I changed my nick a bit.
>|
>| Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>| and noticed that the front axles are locked in 4wd. The indicator
>| light does not indicate that I'm in 4WD and responds to me shifting in
>| and out of 4WD. From what I have read when I shift to 4WD the transfer
>| case of course shifts the gears and via vacuum it trips a pressure
>| switch to energize the indicator light.....this all seems to be in
>| order. Also I understand it also applys or removes vacuum on the axle
>| shift motor and engages / disengages the front axles.
>|
>| So from this I guess I can assume one of the following:
>|
>| 1:) I have a bad vacuum line
>| 2:) The shift motor diaphram is damaged
>| 3:) The shift linkage from the shift motor is damaged / jammed
>|
>| Is there an easy way to manually disengage this until I get time after
>| NewYears to really look at the problem.
>|
>| Also does it apply vacuum to engage the front axles or remove vacuum?
>|
>|
>
12-30-2003, 11:23 PM
#22
Guest
Posts: n/a
Re: YJ Axle Shift Motor
Sorry 87 YJ
I actually applied full vacuum to the diaphram tonight and then
reconnected the whole works it seems to have cleared up the wobble to
some degree, I should have also mentioned that I just did a 1" body
lift on the vehicle but I had noticed this the day before I did the
lift but it has happened in the past where it seemed to lock then
release after a bit of driving. The steering is a lot better now but I
still notice that slight resistance on slow tight corners and I'm
suspecting it may have something to do with the lift and the length of
the streering shaft to the power steering pump.
On Wed, 31 Dec 2003 03:40:19 GMT, "GpGeek" <rupel@hawaii.nospamrr.com>
wrote:
>You can pull the vacuum hose plug off of the front axle and then with the
>engine running see if you can tell if one side still has vacuum
>to it. If it does, then place that side onto the opposite fitting from
>where you pulled it off. That should disengage it and hold it there until
>you can check out the entire system. You didn't tell us what type of
>vehicle you have but if it is like mine (91 YJ) then this should work for
>you. My YJ has the switch for the 4WD light on the front axle disconnect so
>it would still be lit up if the front axle is still engaged. Might yours be
>like this also? If so, you have a different problem.
>
>Good luck and Happy New Year!
>Dave
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>| I was posting as Jeepers and just realized that someone else posts
>| here using the same name ( or someone else use to use that name) so
>| you will notice I changed my nick a bit.
>|
>| Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>| and noticed that the front axles are locked in 4wd. The indicator
>| light does not indicate that I'm in 4WD and responds to me shifting in
>| and out of 4WD. From what I have read when I shift to 4WD the transfer
>| case of course shifts the gears and via vacuum it trips a pressure
>| switch to energize the indicator light.....this all seems to be in
>| order. Also I understand it also applys or removes vacuum on the axle
>| shift motor and engages / disengages the front axles.
>|
>| So from this I guess I can assume one of the following:
>|
>| 1:) I have a bad vacuum line
>| 2:) The shift motor diaphram is damaged
>| 3:) The shift linkage from the shift motor is damaged / jammed
>|
>| Is there an easy way to manually disengage this until I get time after
>| NewYears to really look at the problem.
>|
>| Also does it apply vacuum to engage the front axles or remove vacuum?
>|
>|
>
I actually applied full vacuum to the diaphram tonight and then
reconnected the whole works it seems to have cleared up the wobble to
some degree, I should have also mentioned that I just did a 1" body
lift on the vehicle but I had noticed this the day before I did the
lift but it has happened in the past where it seemed to lock then
release after a bit of driving. The steering is a lot better now but I
still notice that slight resistance on slow tight corners and I'm
suspecting it may have something to do with the lift and the length of
the streering shaft to the power steering pump.
On Wed, 31 Dec 2003 03:40:19 GMT, "GpGeek" <rupel@hawaii.nospamrr.com>
wrote:
>You can pull the vacuum hose plug off of the front axle and then with the
>engine running see if you can tell if one side still has vacuum
>to it. If it does, then place that side onto the opposite fitting from
>where you pulled it off. That should disengage it and hold it there until
>you can check out the entire system. You didn't tell us what type of
>vehicle you have but if it is like mine (91 YJ) then this should work for
>you. My YJ has the switch for the 4WD light on the front axle disconnect so
>it would still be lit up if the front axle is still engaged. Might yours be
>like this also? If so, you have a different problem.
>
>Good luck and Happy New Year!
>Dave
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>| I was posting as Jeepers and just realized that someone else posts
>| here using the same name ( or someone else use to use that name) so
>| you will notice I changed my nick a bit.
>|
>| Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>| and noticed that the front axles are locked in 4wd. The indicator
>| light does not indicate that I'm in 4WD and responds to me shifting in
>| and out of 4WD. From what I have read when I shift to 4WD the transfer
>| case of course shifts the gears and via vacuum it trips a pressure
>| switch to energize the indicator light.....this all seems to be in
>| order. Also I understand it also applys or removes vacuum on the axle
>| shift motor and engages / disengages the front axles.
>|
>| So from this I guess I can assume one of the following:
>|
>| 1:) I have a bad vacuum line
>| 2:) The shift motor diaphram is damaged
>| 3:) The shift linkage from the shift motor is damaged / jammed
>|
>| Is there an easy way to manually disengage this until I get time after
>| NewYears to really look at the problem.
>|
>| Also does it apply vacuum to engage the front axles or remove vacuum?
>|
>|
>
12-30-2003, 11:27 PM
#23
Guest
Posts: n/a
Re: YJ Axle Shift Motor
Thanks I noticed the long url and cut and past it... Hmmmm $170 US
.....maybe I will try to get this old stock one cleaned up and working
properly. I was thinking of maybe buying a new vac harness for the
axle shift motor and pulling off the motor and cleaning it up.
On Wed, 31 Dec 2003 03:58:06 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>Beat ya Bill:
>
>http://www.quadratec.com/cgi-bin/sgi...&UREQC=3&UREQD
>=4&FNM=00&T1=52435+00&AID=10273891&PID=1117139
>
>
>JimG
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>> I was posting as Jeepers and just realized that someone else posts
>> here using the same name ( or someone else use to use that name) so
>> you will notice I changed my nick a bit.
>>
>> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>> and noticed that the front axles are locked in 4wd. The indicator
>> light does not indicate that I'm in 4WD and responds to me shifting in
>> and out of 4WD. From what I have read when I shift to 4WD the transfer
>> case of course shifts the gears and via vacuum it trips a pressure
>> switch to energize the indicator light.....this all seems to be in
>> order. Also I understand it also applys or removes vacuum on the axle
>> shift motor and engages / disengages the front axles.
>>
>> So from this I guess I can assume one of the following:
>>
>> 1:) I have a bad vacuum line
>> 2:) The shift motor diaphram is damaged
>> 3:) The shift linkage from the shift motor is damaged / jammed
>>
>> Is there an easy way to manually disengage this until I get time after
>> NewYears to really look at the problem.
>>
>> Also does it apply vacuum to engage the front axles or remove vacuum?
>>
>>
>
.....maybe I will try to get this old stock one cleaned up and working
properly. I was thinking of maybe buying a new vac harness for the
axle shift motor and pulling off the motor and cleaning it up.
On Wed, 31 Dec 2003 03:58:06 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>Beat ya Bill:
>
>http://www.quadratec.com/cgi-bin/sgi...&UREQC=3&UREQD
>=4&FNM=00&T1=52435+00&AID=10273891&PID=1117139
>
>
>JimG
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>> I was posting as Jeepers and just realized that someone else posts
>> here using the same name ( or someone else use to use that name) so
>> you will notice I changed my nick a bit.
>>
>> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>> and noticed that the front axles are locked in 4wd. The indicator
>> light does not indicate that I'm in 4WD and responds to me shifting in
>> and out of 4WD. From what I have read when I shift to 4WD the transfer
>> case of course shifts the gears and via vacuum it trips a pressure
>> switch to energize the indicator light.....this all seems to be in
>> order. Also I understand it also applys or removes vacuum on the axle
>> shift motor and engages / disengages the front axles.
>>
>> So from this I guess I can assume one of the following:
>>
>> 1:) I have a bad vacuum line
>> 2:) The shift motor diaphram is damaged
>> 3:) The shift linkage from the shift motor is damaged / jammed
>>
>> Is there an easy way to manually disengage this until I get time after
>> NewYears to really look at the problem.
>>
>> Also does it apply vacuum to engage the front axles or remove vacuum?
>>
>>
>
12-30-2003, 11:27 PM
#24
Guest
Posts: n/a
Re: YJ Axle Shift Motor
Thanks I noticed the long url and cut and past it... Hmmmm $170 US
.....maybe I will try to get this old stock one cleaned up and working
properly. I was thinking of maybe buying a new vac harness for the
axle shift motor and pulling off the motor and cleaning it up.
On Wed, 31 Dec 2003 03:58:06 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>Beat ya Bill:
>
>http://www.quadratec.com/cgi-bin/sgi...&UREQC=3&UREQD
>=4&FNM=00&T1=52435+00&AID=10273891&PID=1117139
>
>
>JimG
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>> I was posting as Jeepers and just realized that someone else posts
>> here using the same name ( or someone else use to use that name) so
>> you will notice I changed my nick a bit.
>>
>> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>> and noticed that the front axles are locked in 4wd. The indicator
>> light does not indicate that I'm in 4WD and responds to me shifting in
>> and out of 4WD. From what I have read when I shift to 4WD the transfer
>> case of course shifts the gears and via vacuum it trips a pressure
>> switch to energize the indicator light.....this all seems to be in
>> order. Also I understand it also applys or removes vacuum on the axle
>> shift motor and engages / disengages the front axles.
>>
>> So from this I guess I can assume one of the following:
>>
>> 1:) I have a bad vacuum line
>> 2:) The shift motor diaphram is damaged
>> 3:) The shift linkage from the shift motor is damaged / jammed
>>
>> Is there an easy way to manually disengage this until I get time after
>> NewYears to really look at the problem.
>>
>> Also does it apply vacuum to engage the front axles or remove vacuum?
>>
>>
>
.....maybe I will try to get this old stock one cleaned up and working
properly. I was thinking of maybe buying a new vac harness for the
axle shift motor and pulling off the motor and cleaning it up.
On Wed, 31 Dec 2003 03:58:06 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>Beat ya Bill:
>
>http://www.quadratec.com/cgi-bin/sgi...&UREQC=3&UREQD
>=4&FNM=00&T1=52435+00&AID=10273891&PID=1117139
>
>
>JimG
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>> I was posting as Jeepers and just realized that someone else posts
>> here using the same name ( or someone else use to use that name) so
>> you will notice I changed my nick a bit.
>>
>> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>> and noticed that the front axles are locked in 4wd. The indicator
>> light does not indicate that I'm in 4WD and responds to me shifting in
>> and out of 4WD. From what I have read when I shift to 4WD the transfer
>> case of course shifts the gears and via vacuum it trips a pressure
>> switch to energize the indicator light.....this all seems to be in
>> order. Also I understand it also applys or removes vacuum on the axle
>> shift motor and engages / disengages the front axles.
>>
>> So from this I guess I can assume one of the following:
>>
>> 1:) I have a bad vacuum line
>> 2:) The shift motor diaphram is damaged
>> 3:) The shift linkage from the shift motor is damaged / jammed
>>
>> Is there an easy way to manually disengage this until I get time after
>> NewYears to really look at the problem.
>>
>> Also does it apply vacuum to engage the front axles or remove vacuum?
>>
>>
>
12-30-2003, 11:27 PM
#25
Guest
Posts: n/a
Re: YJ Axle Shift Motor
Thanks I noticed the long url and cut and past it... Hmmmm $170 US
.....maybe I will try to get this old stock one cleaned up and working
properly. I was thinking of maybe buying a new vac harness for the
axle shift motor and pulling off the motor and cleaning it up.
On Wed, 31 Dec 2003 03:58:06 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>Beat ya Bill:
>
>http://www.quadratec.com/cgi-bin/sgi...&UREQC=3&UREQD
>=4&FNM=00&T1=52435+00&AID=10273891&PID=1117139
>
>
>JimG
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>> I was posting as Jeepers and just realized that someone else posts
>> here using the same name ( or someone else use to use that name) so
>> you will notice I changed my nick a bit.
>>
>> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>> and noticed that the front axles are locked in 4wd. The indicator
>> light does not indicate that I'm in 4WD and responds to me shifting in
>> and out of 4WD. From what I have read when I shift to 4WD the transfer
>> case of course shifts the gears and via vacuum it trips a pressure
>> switch to energize the indicator light.....this all seems to be in
>> order. Also I understand it also applys or removes vacuum on the axle
>> shift motor and engages / disengages the front axles.
>>
>> So from this I guess I can assume one of the following:
>>
>> 1:) I have a bad vacuum line
>> 2:) The shift motor diaphram is damaged
>> 3:) The shift linkage from the shift motor is damaged / jammed
>>
>> Is there an easy way to manually disengage this until I get time after
>> NewYears to really look at the problem.
>>
>> Also does it apply vacuum to engage the front axles or remove vacuum?
>>
>>
>
.....maybe I will try to get this old stock one cleaned up and working
properly. I was thinking of maybe buying a new vac harness for the
axle shift motor and pulling off the motor and cleaning it up.
On Wed, 31 Dec 2003 03:58:06 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>Beat ya Bill:
>
>http://www.quadratec.com/cgi-bin/sgi...&UREQC=3&UREQD
>=4&FNM=00&T1=52435+00&AID=10273891&PID=1117139
>
>
>JimG
>
>
>"Jeepster_2" <yj_driver_NO_SPAM@excite.com> wrote in message
>news:1qc4vv8qo9kgfcubmstvi7pkrj31dtn6hl@4ax.com.. .
>> I was posting as Jeepers and just realized that someone else posts
>> here using the same name ( or someone else use to use that name) so
>> you will notice I changed my nick a bit.
>>
>> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
>> and noticed that the front axles are locked in 4wd. The indicator
>> light does not indicate that I'm in 4WD and responds to me shifting in
>> and out of 4WD. From what I have read when I shift to 4WD the transfer
>> case of course shifts the gears and via vacuum it trips a pressure
>> switch to energize the indicator light.....this all seems to be in
>> order. Also I understand it also applys or removes vacuum on the axle
>> shift motor and engages / disengages the front axles.
>>
>> So from this I guess I can assume one of the following:
>>
>> 1:) I have a bad vacuum line
>> 2:) The shift motor diaphram is damaged
>> 3:) The shift linkage from the shift motor is damaged / jammed
>>
>> Is there an easy way to manually disengage this until I get time after
>> NewYears to really look at the problem.
>>
>> Also does it apply vacuum to engage the front axles or remove vacuum?
>>
>>
>
12-30-2003, 11:30 PM
#26
Guest
Posts: n/a
Re: YJ Axle Shift Motor
In a Google search I saw a Jeepster but that may have been a long time
ago and not a person who popped in once or twice. I will change back
the nick. :)
On Wed, 31 Dec 2003 03:52:57 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>No... you posted as "Jeepster" and the other guy is "Jeepers". As far as
>your YJ... it is vacuum activated, and prone to problems. There is a
>modification that eliminates the vacuum actuator. I'm sure someone will
>chime in with the link (Bill).
ago and not a person who popped in once or twice. I will change back
the nick. :)
On Wed, 31 Dec 2003 03:52:57 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>No... you posted as "Jeepster" and the other guy is "Jeepers". As far as
>your YJ... it is vacuum activated, and prone to problems. There is a
>modification that eliminates the vacuum actuator. I'm sure someone will
>chime in with the link (Bill).
12-30-2003, 11:30 PM
#27
Guest
Posts: n/a
Re: YJ Axle Shift Motor
In a Google search I saw a Jeepster but that may have been a long time
ago and not a person who popped in once or twice. I will change back
the nick. :)
On Wed, 31 Dec 2003 03:52:57 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>No... you posted as "Jeepster" and the other guy is "Jeepers". As far as
>your YJ... it is vacuum activated, and prone to problems. There is a
>modification that eliminates the vacuum actuator. I'm sure someone will
>chime in with the link (Bill).
ago and not a person who popped in once or twice. I will change back
the nick. :)
On Wed, 31 Dec 2003 03:52:57 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>No... you posted as "Jeepster" and the other guy is "Jeepers". As far as
>your YJ... it is vacuum activated, and prone to problems. There is a
>modification that eliminates the vacuum actuator. I'm sure someone will
>chime in with the link (Bill).
12-30-2003, 11:30 PM
#28
Guest
Posts: n/a
Re: YJ Axle Shift Motor
In a Google search I saw a Jeepster but that may have been a long time
ago and not a person who popped in once or twice. I will change back
the nick. :)
On Wed, 31 Dec 2003 03:52:57 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>No... you posted as "Jeepster" and the other guy is "Jeepers". As far as
>your YJ... it is vacuum activated, and prone to problems. There is a
>modification that eliminates the vacuum actuator. I'm sure someone will
>chime in with the link (Bill).
ago and not a person who popped in once or twice. I will change back
the nick. :)
On Wed, 31 Dec 2003 03:52:57 GMT, "JimG" <jimg@cj7_2muchspam.com>
wrote:
>No... you posted as "Jeepster" and the other guy is "Jeepers". As far as
>your YJ... it is vacuum activated, and prone to problems. There is a
>modification that eliminates the vacuum actuator. I'm sure someone will
>chime in with the link (Bill).
01-01-2004, 10:18 AM
#29
Guest
Posts: n/a
Re: YJ Axle Shift Motor
You didn't say what year or model, there are some differences.
Pressure switch on the firewall sorta indicates '87 to '90 YJ
Wrangler.
First off, don't worry about the front axle being continuouisly
engaged, all of the TJ's ('97 and later) run that way all the time.
The shift motor is vac pulled each way, in and out. The 4wd
pressure switch and the 4wd light are quite reliable, if the
light works and responds, things are usually all right in the
axle. In fact, the light will not go out until the axle disengages.
The really shaky part of all this is the vac lines and the switch
on the transfer case. ($35 and $15 respectively)
So if all that works, I have to ask what makes you think it is
locked in 4wd? The only thing that can be broken and give you
this particular set of symptoms is the shift fork inside the
shift motor. 4 bolts and you can inspect it.
Jeepster_2 wrote:
> I was posting as Jeepers and just realized that someone else posts
> here using the same name ( or someone else use to use that name) so
> you will notice I changed my nick a bit.
>
> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
> and noticed that the front axles are locked in 4wd. The indicator
> light does not indicate that I'm in 4WD and responds to me shifting in
> and out of 4WD. From what I have read when I shift to 4WD the transfer
> case of course shifts the gears and via vacuum it trips a pressure
> switch to energize the indicator light.....this all seems to be in
> order. Also I understand it also applys or removes vacuum on the axle
> shift motor and engages / disengages the front axles.
>
> So from this I guess I can assume one of the following:
>
> 1:) I have a bad vacuum line
> 2:) The shift motor diaphram is damaged
> 3:) The shift linkage from the shift motor is damaged / jammed
>
> Is there an easy way to manually disengage this until I get time after
> NewYears to really look at the problem.
>
> Also does it apply vacuum to engage the front axles or remove vacuum?
>
>
Pressure switch on the firewall sorta indicates '87 to '90 YJ
Wrangler.
First off, don't worry about the front axle being continuouisly
engaged, all of the TJ's ('97 and later) run that way all the time.
The shift motor is vac pulled each way, in and out. The 4wd
pressure switch and the 4wd light are quite reliable, if the
light works and responds, things are usually all right in the
axle. In fact, the light will not go out until the axle disengages.
The really shaky part of all this is the vac lines and the switch
on the transfer case. ($35 and $15 respectively)
So if all that works, I have to ask what makes you think it is
locked in 4wd? The only thing that can be broken and give you
this particular set of symptoms is the shift fork inside the
shift motor. 4 bolts and you can inspect it.
Jeepster_2 wrote:
> I was posting as Jeepers and just realized that someone else posts
> here using the same name ( or someone else use to use that name) so
> you will notice I changed my nick a bit.
>
> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
> and noticed that the front axles are locked in 4wd. The indicator
> light does not indicate that I'm in 4WD and responds to me shifting in
> and out of 4WD. From what I have read when I shift to 4WD the transfer
> case of course shifts the gears and via vacuum it trips a pressure
> switch to energize the indicator light.....this all seems to be in
> order. Also I understand it also applys or removes vacuum on the axle
> shift motor and engages / disengages the front axles.
>
> So from this I guess I can assume one of the following:
>
> 1:) I have a bad vacuum line
> 2:) The shift motor diaphram is damaged
> 3:) The shift linkage from the shift motor is damaged / jammed
>
> Is there an easy way to manually disengage this until I get time after
> NewYears to really look at the problem.
>
> Also does it apply vacuum to engage the front axles or remove vacuum?
>
>
01-01-2004, 10:18 AM
#30
Guest
Posts: n/a
Re: YJ Axle Shift Motor
You didn't say what year or model, there are some differences.
Pressure switch on the firewall sorta indicates '87 to '90 YJ
Wrangler.
First off, don't worry about the front axle being continuouisly
engaged, all of the TJ's ('97 and later) run that way all the time.
The shift motor is vac pulled each way, in and out. The 4wd
pressure switch and the 4wd light are quite reliable, if the
light works and responds, things are usually all right in the
axle. In fact, the light will not go out until the axle disengages.
The really shaky part of all this is the vac lines and the switch
on the transfer case. ($35 and $15 respectively)
So if all that works, I have to ask what makes you think it is
locked in 4wd? The only thing that can be broken and give you
this particular set of symptoms is the shift fork inside the
shift motor. 4 bolts and you can inspect it.
Jeepster_2 wrote:
> I was posting as Jeepers and just realized that someone else posts
> here using the same name ( or someone else use to use that name) so
> you will notice I changed my nick a bit.
>
> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
> and noticed that the front axles are locked in 4wd. The indicator
> light does not indicate that I'm in 4WD and responds to me shifting in
> and out of 4WD. From what I have read when I shift to 4WD the transfer
> case of course shifts the gears and via vacuum it trips a pressure
> switch to energize the indicator light.....this all seems to be in
> order. Also I understand it also applys or removes vacuum on the axle
> shift motor and engages / disengages the front axles.
>
> So from this I guess I can assume one of the following:
>
> 1:) I have a bad vacuum line
> 2:) The shift motor diaphram is damaged
> 3:) The shift linkage from the shift motor is damaged / jammed
>
> Is there an easy way to manually disengage this until I get time after
> NewYears to really look at the problem.
>
> Also does it apply vacuum to engage the front axles or remove vacuum?
>
>
Pressure switch on the firewall sorta indicates '87 to '90 YJ
Wrangler.
First off, don't worry about the front axle being continuouisly
engaged, all of the TJ's ('97 and later) run that way all the time.
The shift motor is vac pulled each way, in and out. The 4wd
pressure switch and the 4wd light are quite reliable, if the
light works and responds, things are usually all right in the
axle. In fact, the light will not go out until the axle disengages.
The really shaky part of all this is the vac lines and the switch
on the transfer case. ($35 and $15 respectively)
So if all that works, I have to ask what makes you think it is
locked in 4wd? The only thing that can be broken and give you
this particular set of symptoms is the shift fork inside the
shift motor. 4 bolts and you can inspect it.
Jeepster_2 wrote:
> I was posting as Jeepers and just realized that someone else posts
> here using the same name ( or someone else use to use that name) so
> you will notice I changed my nick a bit.
>
> Anyways 2 days ago I had my vehicle in 4WD and today I went to work
> and noticed that the front axles are locked in 4wd. The indicator
> light does not indicate that I'm in 4WD and responds to me shifting in
> and out of 4WD. From what I have read when I shift to 4WD the transfer
> case of course shifts the gears and via vacuum it trips a pressure
> switch to energize the indicator light.....this all seems to be in
> order. Also I understand it also applys or removes vacuum on the axle
> shift motor and engages / disengages the front axles.
>
> So from this I guess I can assume one of the following:
>
> 1:) I have a bad vacuum line
> 2:) The shift motor diaphram is damaged
> 3:) The shift linkage from the shift motor is damaged / jammed
>
> Is there an easy way to manually disengage this until I get time after
> NewYears to really look at the problem.
>
> Also does it apply vacuum to engage the front axles or remove vacuum?
>
>
