Clutch Noise, rubbing sound while turning at low speed?

[Shesabeast]

When im in 1st or 2nd, turn at low speed, 10mph or under, i hear and feel a rough rubbing sound coming from the rear end. Usally backing out of driveway, pulling out of a parking space, things like that. Any thoughts on what it could be?

[Bill F]

There is a TSB out for this. Something to do with an additive for the rear end fluid. I'm taking mine in Tuesday to have it done. I have a LT with 2200 miles, BTW.

[Shesabeast]

Cool... Glad it's a simple fix.. I've got an SS with 2500 miles on her, so it had me concerned.

[Bill F]

Apparently it affects Camaros and Vettes with a posi rear end.

[gahammerle]

Do you know the TSB number? Or have the text of the TSB?

[Bill F]

I got it in another forum, give me a few mins. to find it.

[Bill F]

Here you go. Check out page 7 and 8 of the attached pdf.

PI0137A: Rear Axle Chatter Type Noise on Low Speed Turns - (Feb 24, 2011)







Subject:

Rear Axle Chatter Type Noise on Low Speed Turns






Models:

2010-2011 Chevrolet Camaro






Equipped with Limited-Slip Differential (RPO G80)




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This PI is being revised to add the 2011 model year. Please discard PI0137.

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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern

Some customers may comment on a chatter-type noise from the rear of the vehicle while making low speed turns.

This condition may be caused by a slip/stick of the posi-traction clutch plates. As the plates slip and stick, a jumping or jerking feel occurs, accompanied by a chatter noise.

Recommendation/Instructions

Important: Prior to adding the limited-slip axle additive, the bottle MUST be shaken vigorously for at least one minute to mix the additive thoroughly, then immediately poured into the differential.

Drain and refill the rear differential with new fluid, GM P/N 89021677 (in Canada, use P/N 89021678) and additive, GM P/N 1052358 (in Canada, use P/N 992694). Refer to the Differential Oil Replacement procedure in SI.

Once the differential fluid has been changed, the vehicle must be driven in eight tight figure eight maneuvers to heat the fluid and allow the additive to be worked into the clutch plates

[CTS]

This has always been a problem with GM and limited slip differential (posi). They use cheap low bidder gear lubes. Get ride of the GM stuff and use AMSOIL, Red Line or Royal Purple synthetic 75W-90 gear lube.

My new 2009 CTS had the have the gear lube replaced and additive used before I had 500 miles on the car. Less the 500 miles later you could hear the clutches grabbing/releasing on turns and sometimes a banging noise when slowign down. I insisted they install AMSOIL Severe Gear 75W-90 instead of GM crap and to this day, 3.5 yrs later I have not heard one noise from my rear axle. Factory fill lubes a low bid. If you continue to use the GM lube you will continue to have this problem. GM is stuborn, they will never recommend any lube that does not make them money.

PS - Way back in 1970 my new Chevelle SS454 did the very same thing and they changed the lube so many times that they refused to do it again and I had to live with it.

[BigPopa71]

I had the same noise! They replaced all the seals and bearings in my rear. Problem solved!

[CamaroSkooter]

13 month thread Necro...

My suggestion: Don't take it to Best Chevrolet in Easley, South Carolina

[Easton091]

I have same issue. Taking it in soon

[h2oplay]

This happened to me at 10k and at 20k, just change out the lube and be sure to add 4 oz of friction modifier, I used amsoil this time.