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Rear Passenger Clunking

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Old 08-26-2022 | 09:29 AM
  #16  
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Originally Posted by T&T Racing
Probably not stub axle wheel bearing because only noise in turning. More likely one of the U-joints of the half shaft on the passenger side, turning causes half shaft U-Joints to change angular orientation, binding occurs if U-joints has woren internals.
I would rather investigate the UJ’s before the bearings. That’s for that direction.

I’m assuming I should replace the UJ’s for the entire rear at the same time?

Any direction on manufacture or best place to source? I don’t track the car, just weekend driving.
Old 08-27-2022 | 09:22 AM
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Originally Posted by 944StaceyQ
I would rather investigate the UJ’s before the bearings. That’s for that direction.

I’m assuming I should replace the UJ’s for the entire rear at the same time?

Any direction on manufacture or best place to source? I don’t track the car, just weekend driving.
No need to replace all the CV U joints, just the one(s) that failed.
The rear of the car needs to be safely placed on jack stands. Try to move the half shaft axle back and forth to detect play. Compare passenger to driver side movement and/or excess play. Clarks Garage website might be helpful and use advance search on RL.
The ONLY acceptable replacement CV U joint is GKN, the others are trash.

Last edited by T&T Racing; 08-27-2022 at 09:24 AM.
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Old 08-28-2022 | 01:08 PM
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Originally Posted by T&T Racing
The ONLY acceptable replacement CV U joint is GKN, the others are trash.

One caveat is the EMPI Vanagon Type 2 U Joints which are compatible with any 944 running a 33 spline rear axle shaft (I believe late model cars).
EMPI 87-9917 EMPI 87-9917

They also come in a chrome moly version
EMPI 98-5084 EMPI 98-5084

Running these non-chrome moly ones on my S2 and I have found them to be of high quality and good price.

Last edited by walfreyydo; 08-28-2022 at 01:10 PM.
Old 08-28-2022 | 05:58 PM
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Originally Posted by Dingopher
As far as the wheel bearings go, I may have to give the stub axles a check with a dial indicator as suggested by Tiger. When I replaced the bearings they came out and went in fairly easily, but I did need to use a drift to remove all but the outer passenger bearing. That one just fell out. The stub axles also took a good bit of force to get in. If the stub axle doesn't have runout, would it be reasonable to assume that the bearing seat in the trailing arm is worn out? That seems unlikely to me, but I guess it's possible.
your symptoms don't suggest wheel bearings, and it's much easier to change the axles/ CV joints than bearings anyway. Stub axles should not 'wear out' and if you replaced the bearings already then they should be fine.

put in new CV joints.

only other (less likely) culprit might be the inner trailing arm bushing, but I think that would cause a clunk that is not necessarily related to speed, moreso turning
Old 08-29-2022 | 04:38 PM
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Originally Posted by walfreyydo
-


One caveat is the EMPI Vanagon Type 2 U Joints which are compatible with any 944 running a 33 spline rear axle shaft (I believe late model cars).
EMPI 87-9917

They also come in a chrome moly version
EMPI 98-5084

Running these non-chrome moly ones on my S2 and I have found them to be of high quality and good price.
I’ve got an early 85 so I’m not sure what the axle spline count is.
Old 08-29-2022 | 07:10 PM
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Originally Posted by 944StaceyQ
I’ve got an early 85 so I’m not sure what the axle spline count is.
If you want to track the car GKN is no trouble option
Old 08-30-2022 | 11:21 AM
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Originally Posted by 944StaceyQ
I’ve got an early 85 so I’m not sure what the axle spline count is.
Youll have to pull an axle and check. Once removed you should be able to see the back side of the joint, where it mates to the trans or stub, a circlip and some of the splines slightly protruding which you should be able to count.

Last edited by walfreyydo; 08-30-2022 at 11:22 AM.
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Old 09-01-2022 | 05:16 PM
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After reading the title of this thread I was going to suggest turning around (while stopped of course) and telling the passenger to stop clunking.
I didn't read the whole thread closely but... have you checked your transmission mounts? Mine were in bad shape and gave some of the same symptoms.
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Old 09-01-2022 | 11:27 PM
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Originally Posted by elgy
have you checked your transmission mounts? Mine were in bad shape and gave some of the same symptoms.
good thought!
Old 09-22-2022 | 10:45 PM
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Originally Posted by elgy
After reading the title of this thread I was going to suggest turning around (while stopped of course) and telling the passenger to stop clunking.
I didn't read the whole thread closely but... have you checked your transmission mounts? Mine were in bad shape and gave some of the same symptoms.
I haven't looked at them too closely, I'll have to give them a closer look. Anything specific you recommend looking for, other than them not looking like they're falling apart?
Old 09-23-2022 | 10:43 AM
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If you can move the transmission by hand and it swings back and forth easily, you may want to consider doing the DIY Urethane filling method. Cheap and effective.
Old 09-24-2022 | 10:52 AM
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Originally Posted by walfreyydo
If you can move the transmission by hand and it swings back and forth easily, you may want to consider doing the DIY Urethane filling method. Cheap and effective.
I have the DIY Urethane single point transmission bracket for sale. Never Installed, PM me



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