Drink

Thanks Jeff.
I haven't really ruled out the T-case. But, this became an issue
immediately upon R&P swap/Locker install. I'd try some of the other advice
but I'm in the middle of the project (for the past many years:) I hit a
deal on the engine and haven't swapped the front gears yet. Gotta get the
front shaft cut to fit as well. I had a professional transmission shop set
up the rear end Again to rule out my own incompetence. Haha! And, if you
can believe it, I'm considering swapping to Dana44's or GM 10/12 bolt axles
after everything I've invested.
You make a good point about it not being the trans. Although the slapping
sounds like its in the gearbox, I know it's differential-related and that's
what I don't get yet.
I'll have to see if I can ssttrrreeeeetch the front shaft just enough to
give it a walk around the block. Pretty sure it's not long enough, though.
P.S. How difficult would it be to just say, "to heck with it" and put in
Dana44's from a 79 Cherokee (front discs, six-lug wheels)? Or, would a
10/12 bolt from a suburban or blazer be better?
Jim
'76 CJ-7: Dana30 / Chevy 350 TPI / NV4500 / Dana300 / AMC20

"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:nuedndldRJ9dkjvenZ2dnUVZ_tmdnZ2d@ez2.net...
>I have 4.10 gears and the full Detroit in my AMC20, and there is no noise.
>
> You said, " Swapped gears&locker myself; slapping has been there ever
> since." Then you said that you replaced the trans and motor. If the noise
> was there BEFORE you swapped the trans, what makes youthink the noise is
> coming from the trans?
>
> I don't recall if you have a CJ5 or CJ7, but if you have a double-cardan
> joint in the driveshaft, perhaps the center joint is toast. Mine recently
> took a bye and made a clunking noise, but it was mostly on acceleration
> and your noise is on decelleration.
>
> You also said that "absolutely everything has been swapped out, except the
> D300." Why does the D300 escape scrutiny? Also, the gear set (R&P) has to
> be set up properly, did you do that? It can create noises that can travel
> up the driveshaft and sound like the transmission.
>
> Knowing from personal experience how much torque steer there can be in a
> CJ, have you removed the rear drive shaft and drive on the front one to
> see if the noise remains? If the noise goes away, you'll have a pretty
> good chance that the trans isn't the object of your obsession, if the
> noise remains, then you still have the tcase in the picture, but you'll
> know the rear gear set is okay.

Drink

Thanks Jeff.
I haven't really ruled out the T-case. But, this became an issue
immediately upon R&P swap/Locker install. I'd try some of the other advice
but I'm in the middle of the project (for the past many years:) I hit a
deal on the engine and haven't swapped the front gears yet. Gotta get the
front shaft cut to fit as well. I had a professional transmission shop set
up the rear end Again to rule out my own incompetence. Haha! And, if you
can believe it, I'm considering swapping to Dana44's or GM 10/12 bolt axles
after everything I've invested.
You make a good point about it not being the trans. Although the slapping
sounds like its in the gearbox, I know it's differential-related and that's
what I don't get yet.
I'll have to see if I can ssttrrreeeeetch the front shaft just enough to
give it a walk around the block. Pretty sure it's not long enough, though.
P.S. How difficult would it be to just say, "to heck with it" and put in
Dana44's from a 79 Cherokee (front discs, six-lug wheels)? Or, would a
10/12 bolt from a suburban or blazer be better?
Jim
'76 CJ-7: Dana30 / Chevy 350 TPI / NV4500 / Dana300 / AMC20

"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:nuedndldRJ9dkjvenZ2dnUVZ_tmdnZ2d@ez2.net...
>I have 4.10 gears and the full Detroit in my AMC20, and there is no noise.
>
> You said, " Swapped gears&locker myself; slapping has been there ever
> since." Then you said that you replaced the trans and motor. If the noise
> was there BEFORE you swapped the trans, what makes youthink the noise is
> coming from the trans?
>
> I don't recall if you have a CJ5 or CJ7, but if you have a double-cardan
> joint in the driveshaft, perhaps the center joint is toast. Mine recently
> took a bye and made a clunking noise, but it was mostly on acceleration
> and your noise is on decelleration.
>
> You also said that "absolutely everything has been swapped out, except the
> D300." Why does the D300 escape scrutiny? Also, the gear set (R&P) has to
> be set up properly, did you do that? It can create noises that can travel
> up the driveshaft and sound like the transmission.
>
> Knowing from personal experience how much torque steer there can be in a
> CJ, have you removed the rear drive shaft and drive on the front one to
> see if the noise remains? If the noise goes away, you'll have a pretty
> good chance that the trans isn't the object of your obsession, if the
> noise remains, then you still have the tcase in the picture, but you'll
> know the rear gear set is okay.

Greg

Just to add my two cents in, I also have an AMC 20 with full detroit, 4.10
gears, D 300, but AX15 tranny with adapter, no tranny noise or problems, I'd
be checking the D300 too, and as I just helped my daughter replace her u
joint in her double cardon drive shaft at only one year old, ( driveshaft,
not daughter ), we couldn't get any movement out of it in nuetral with no
load on it, but as soon as we dissconnected it the cap that had no bearings
left in it fell off, so like Mike said check those again too.

"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:nuedndldRJ9dkjvenZ2dnUVZ_tmdnZ2d@ez2.net...
>I have 4.10 gears and the full Detroit in my AMC20, and there is no noise.
>
> You said, " Swapped gears&locker myself; slapping has been there ever
> since." Then you said that you replaced the trans and motor. If the noise
> was there BEFORE you swapped the trans, what makes youthink the noise is
> coming from the trans?
>
> I don't recall if you have a CJ5 or CJ7, but if you have a double-cardan
> joint in the driveshaft, perhaps the center joint is toast. Mine recently
> took a bye and made a clunking noise, but it was mostly on acceleration
> and your noise is on decelleration.
>
> You also said that "absolutely everything has been swapped out, except the
> D300." Why does the D300 escape scrutiny? Also, the gear set (R&P) has to
> be set up properly, did you do that? It can create noises that can travel
> up the driveshaft and sound like the transmission.
>
> Knowing from personal experience how much torque steer there can be in a
> CJ, have you removed the rear drive shaft and drive on the front one to
> see if the noise remains? If the noise goes away, you'll have a pretty
> good chance that the trans isn't the object of your obsession, if the
> noise remains, then you still have the tcase in the picture, but you'll
> know the rear gear set is okay.
>
>
>
>
>
> "Drink" <drink@gnt.net> wrote in message
> news:do4r0j$rli$1@news.utelfla.com...
>> No, Mike. That's not it. The U-joints are fresh and in great shape.
>> It did it before. As a matter of fact, it started after changing to 4.10
>> gears and the LockRite. Since then, absolutely everything's been
>> upgraded and swapped out except the Dana300. I don't wanna lure anyone
>> into a diagnosis of the transfer case, though, because it really sounds
>> like the tranny.
>>
>> Here's the timeline recap: Swapped gears&locker myself; slapping has
>> been there ever since.
>> Then dropped in a 350 V-8, NV4500 with all new clutch and components,
>> reinstalled the orig. Dana300, shortened/balanced driveshaft w/new
>> U-joints, had a pro RE-setup the AMC20 just to be sure.
>> Jim
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:43A59664.CE7D78BA@sympatico.ca...
>>>I recently heard that kind of noise when decelerating in gear...
>>>
>>> I pulled over and disconnected my front hubs before my now dead
>>> driveshaft u-joint could take out the yoke too.
>>>
>>> I would sure be checking those u-joints out really carefully. The
>>> vehicle needs to have the wheels blocked and in neutral when you crawl
>>> under to see if there is any play or rust stains around the U-joint
>>> caps.
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
>>> (More Off Road album links at bottom of the view page)
>>>
>>> Drink wrote:
>>>>
>>>> Let me see if I can describe this...
>>>> Put in 4.10 gears and a LockRite locker at the same time (which
>>>> replaced
>>>> stock 3.54's and open spider gears) in a AMC 20 differential with 33"
>>>> tires.
>>>> Ever since, the manual transmission gears go "SLAP, Slap, slap slap"
>>>> when
>>>> you are decelerating, in-gear, with the clutch pushed in. It feels
>>>> like the
>>>> spinning driveshaft's "slapping" the gears to keep up. It's really
>>>> noticeable when moving slowly in 1st or 2nd.
>>>> Don't think it's got anything to do with the locker other than
>>>> possibly a
>>>> little more slop in the diff. Is it because I installed such low
>>>> gears?
>>>> Combination?
>>>> P.S. still does it after installing a NV4500 w/orig. Dana300. This NV
>>>> really sounds like a miniature jack hammer over 35 in neutral but
>>>> that's a
>>>> different post.
>>>> Regards,
>>>> Drink
>>>> 76 CJ7, GM 350, TPI, NV4500, DANA300
>>>> Dana30/AMC20 w1-pc axles, LockRite, 4.10s
>>
>>
>

Greg

Just to add my two cents in, I also have an AMC 20 with full detroit, 4.10
gears, D 300, but AX15 tranny with adapter, no tranny noise or problems, I'd
be checking the D300 too, and as I just helped my daughter replace her u
joint in her double cardon drive shaft at only one year old, ( driveshaft,
not daughter ), we couldn't get any movement out of it in nuetral with no
load on it, but as soon as we dissconnected it the cap that had no bearings
left in it fell off, so like Mike said check those again too.

"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:nuedndldRJ9dkjvenZ2dnUVZ_tmdnZ2d@ez2.net...
>I have 4.10 gears and the full Detroit in my AMC20, and there is no noise.
>
> You said, " Swapped gears&locker myself; slapping has been there ever
> since." Then you said that you replaced the trans and motor. If the noise
> was there BEFORE you swapped the trans, what makes youthink the noise is
> coming from the trans?
>
> I don't recall if you have a CJ5 or CJ7, but if you have a double-cardan
> joint in the driveshaft, perhaps the center joint is toast. Mine recently
> took a bye and made a clunking noise, but it was mostly on acceleration
> and your noise is on decelleration.
>
> You also said that "absolutely everything has been swapped out, except the
> D300." Why does the D300 escape scrutiny? Also, the gear set (R&P) has to
> be set up properly, did you do that? It can create noises that can travel
> up the driveshaft and sound like the transmission.
>
> Knowing from personal experience how much torque steer there can be in a
> CJ, have you removed the rear drive shaft and drive on the front one to
> see if the noise remains? If the noise goes away, you'll have a pretty
> good chance that the trans isn't the object of your obsession, if the
> noise remains, then you still have the tcase in the picture, but you'll
> know the rear gear set is okay.
>
>
>
>
>
> "Drink" <drink@gnt.net> wrote in message
> news:do4r0j$rli$1@news.utelfla.com...
>> No, Mike. That's not it. The U-joints are fresh and in great shape.
>> It did it before. As a matter of fact, it started after changing to 4.10
>> gears and the LockRite. Since then, absolutely everything's been
>> upgraded and swapped out except the Dana300. I don't wanna lure anyone
>> into a diagnosis of the transfer case, though, because it really sounds
>> like the tranny.
>>
>> Here's the timeline recap: Swapped gears&locker myself; slapping has
>> been there ever since.
>> Then dropped in a 350 V-8, NV4500 with all new clutch and components,
>> reinstalled the orig. Dana300, shortened/balanced driveshaft w/new
>> U-joints, had a pro RE-setup the AMC20 just to be sure.
>> Jim
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:43A59664.CE7D78BA@sympatico.ca...
>>>I recently heard that kind of noise when decelerating in gear...
>>>
>>> I pulled over and disconnected my front hubs before my now dead
>>> driveshaft u-joint could take out the yoke too.
>>>
>>> I would sure be checking those u-joints out really carefully. The
>>> vehicle needs to have the wheels blocked and in neutral when you crawl
>>> under to see if there is any play or rust stains around the U-joint
>>> caps.
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
>>> (More Off Road album links at bottom of the view page)
>>>
>>> Drink wrote:
>>>>
>>>> Let me see if I can describe this...
>>>> Put in 4.10 gears and a LockRite locker at the same time (which
>>>> replaced
>>>> stock 3.54's and open spider gears) in a AMC 20 differential with 33"
>>>> tires.
>>>> Ever since, the manual transmission gears go "SLAP, Slap, slap slap"
>>>> when
>>>> you are decelerating, in-gear, with the clutch pushed in. It feels
>>>> like the
>>>> spinning driveshaft's "slapping" the gears to keep up. It's really
>>>> noticeable when moving slowly in 1st or 2nd.
>>>> Don't think it's got anything to do with the locker other than
>>>> possibly a
>>>> little more slop in the diff. Is it because I installed such low
>>>> gears?
>>>> Combination?
>>>> P.S. still does it after installing a NV4500 w/orig. Dana300. This NV
>>>> really sounds like a miniature jack hammer over 35 in neutral but
>>>> that's a
>>>> different post.
>>>> Regards,
>>>> Drink
>>>> 76 CJ7, GM 350, TPI, NV4500, DANA300
>>>> Dana30/AMC20 w1-pc axles, LockRite, 4.10s
>>
>>
>

Greg

Just to add my two cents in, I also have an AMC 20 with full detroit, 4.10
gears, D 300, but AX15 tranny with adapter, no tranny noise or problems, I'd
be checking the D300 too, and as I just helped my daughter replace her u
joint in her double cardon drive shaft at only one year old, ( driveshaft,
not daughter ), we couldn't get any movement out of it in nuetral with no
load on it, but as soon as we dissconnected it the cap that had no bearings
left in it fell off, so like Mike said check those again too.

"Jeff Strickland" <crwlr@yahoo.com> wrote in message
news:nuedndldRJ9dkjvenZ2dnUVZ_tmdnZ2d@ez2.net...
>I have 4.10 gears and the full Detroit in my AMC20, and there is no noise.
>
> You said, " Swapped gears&locker myself; slapping has been there ever
> since." Then you said that you replaced the trans and motor. If the noise
> was there BEFORE you swapped the trans, what makes youthink the noise is
> coming from the trans?
>
> I don't recall if you have a CJ5 or CJ7, but if you have a double-cardan
> joint in the driveshaft, perhaps the center joint is toast. Mine recently
> took a bye and made a clunking noise, but it was mostly on acceleration
> and your noise is on decelleration.
>
> You also said that "absolutely everything has been swapped out, except the
> D300." Why does the D300 escape scrutiny? Also, the gear set (R&P) has to
> be set up properly, did you do that? It can create noises that can travel
> up the driveshaft and sound like the transmission.
>
> Knowing from personal experience how much torque steer there can be in a
> CJ, have you removed the rear drive shaft and drive on the front one to
> see if the noise remains? If the noise goes away, you'll have a pretty
> good chance that the trans isn't the object of your obsession, if the
> noise remains, then you still have the tcase in the picture, but you'll
> know the rear gear set is okay.
>
>
>
>
>
> "Drink" <drink@gnt.net> wrote in message
> news:do4r0j$rli$1@news.utelfla.com...
>> No, Mike. That's not it. The U-joints are fresh and in great shape.
>> It did it before. As a matter of fact, it started after changing to 4.10
>> gears and the LockRite. Since then, absolutely everything's been
>> upgraded and swapped out except the Dana300. I don't wanna lure anyone
>> into a diagnosis of the transfer case, though, because it really sounds
>> like the tranny.
>>
>> Here's the timeline recap: Swapped gears&locker myself; slapping has
>> been there ever since.
>> Then dropped in a 350 V-8, NV4500 with all new clutch and components,
>> reinstalled the orig. Dana300, shortened/balanced driveshaft w/new
>> U-joints, had a pro RE-setup the AMC20 just to be sure.
>> Jim
>>
>> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> news:43A59664.CE7D78BA@sympatico.ca...
>>>I recently heard that kind of noise when decelerating in gear...
>>>
>>> I pulled over and disconnected my front hubs before my now dead
>>> driveshaft u-joint could take out the yoke too.
>>>
>>> I would sure be checking those u-joints out really carefully. The
>>> vehicle needs to have the wheels blocked and in neutral when you crawl
>>> under to see if there is any play or rust stains around the U-joint
>>> caps.
>>>
>>> Mike
>>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> 88 Cherokee 235 BFG AT's
>>> Canadian Off Road Trips Photos: Non members can still view!
>>> Aug./05 http://www.imagestation.com/album/in...?id=2120343242
>>> (More Off Road album links at bottom of the view page)
>>>
>>> Drink wrote:
>>>>
>>>> Let me see if I can describe this...
>>>> Put in 4.10 gears and a LockRite locker at the same time (which
>>>> replaced
>>>> stock 3.54's and open spider gears) in a AMC 20 differential with 33"
>>>> tires.
>>>> Ever since, the manual transmission gears go "SLAP, Slap, slap slap"
>>>> when
>>>> you are decelerating, in-gear, with the clutch pushed in. It feels
>>>> like the
>>>> spinning driveshaft's "slapping" the gears to keep up. It's really
>>>> noticeable when moving slowly in 1st or 2nd.
>>>> Don't think it's got anything to do with the locker other than
>>>> possibly a
>>>> little more slop in the diff. Is it because I installed such low
>>>> gears?
>>>> Combination?
>>>> P.S. still does it after installing a NV4500 w/orig. Dana300. This NV
>>>> really sounds like a miniature jack hammer over 35 in neutral but
>>>> that's a
>>>> different post.
>>>> Regards,
>>>> Drink
>>>> 76 CJ7, GM 350, TPI, NV4500, DANA300
>>>> Dana30/AMC20 w1-pc axles, LockRite, 4.10s
>>
>>
>