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86 930 Binding in Rear End

I need some help to diagnose a problem that has start up in my 1986 930 with 110000 miles on it.

I recently started to feel a binding in the rear end specifically when going form a dead stop in first gear either turning left or right. It doesn't do it when starting from a stop and going straight. It doesn't do it if in neutral and rolling around a corner. There is no new noise to speak of just a feeling that something is dragging or binding. It also seems to get worse when the car has been driving for more than 20 minutes.

I am just looking for ideas of what it could be before I start pulling it apart.

Thanks!
Old 07-26-2017, 08:16 AM
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more fiber..

LSD?

Last edited by boosted79; 07-26-2017 at 09:27 AM..
Old 07-26-2017, 09:20 AM
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CV joint coming loose? Check the four cv joints on the end of the axels.

Rahl
Old 07-26-2017, 11:04 AM
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It could be your clutch rubber donut failing. Maybe something in the limited slip? Check to see if your brake calipers and rotors are tight...
Old 07-26-2017, 12:14 PM
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more fiber..
Or in IcyHotStuff's case, less recreational activity!
Old 07-26-2017, 01:30 PM
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Rear wheel bearing? CV joint? brakes?

I suggest putting it up on a lift or jack stands and checking all the rotating components to start eliminating variables.
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Emery

1988 930 coupe - Silver Metallic
stock 3.3L w/GT35R, B&B Headers, RarlyL8 muffler, B&B intercooler, Tial wastegate, Electromotive tecGT based phased sequential EFI & ignition, Wevo shifter
Old 07-26-2017, 05:05 PM
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Or in IcyHotStuff's case, less recreational activity!
As long as I stay two states away from you, I'm safe!!
Old 07-26-2017, 06:40 PM
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Doesn't LSD tend to do that to some extent anyway? Maybe it gets worse with age. Seems both of my 930 have done this....the second one a little more pronounced. Only when turning sharp from a dead stop.
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Old 07-26-2017, 07:03 PM
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Interesting point on the LSD. Maybe the trans lube needs to be changed and/or LSD additive? I would think if the LSD disks themselves are worn there would be less drag than when they are new? Maybe someone with deeper knowledge of limited slip can advise.
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Emery

1988 930 coupe - Silver Metallic
stock 3.3L w/GT35R, B&B Headers, RarlyL8 muffler, B&B intercooler, Tial wastegate, Electromotive tecGT based phased sequential EFI & ignition, Wevo shifter
Old 07-27-2017, 04:47 AM
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Trans Lube

Interesting that you mention the trans lube as I just noticed this started right after having the transmission lube replaced.

I emailed the mechanic that did the work and he suggested this may be the issue.

Thanks for all the input.
Old 07-27-2017, 08:21 AM
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Interesting that you mention the trans lube as I just noticed this started right after having the transmission lube replaced.

I emailed the mechanic that did the work and he suggested this may be the issue.

Thanks for all the input.
Ding ding ding.

Add an ounce of LSD friction modifier (GM, Redline, Motul, doesn't matter which) and it should quiet it down.
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Old 07-27-2017, 09:29 AM
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