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Sven59 · 05-15-2013, 04:55 PM

I had mine to the Dealer twice, the first time they replaces the ring and pinion. They said the backlash was off, it was quiet for awhile and the noise came back. Next time they flushed it and refilled and it has been quiet since. Don't know if this is the universal fix but it worked for me. Below is the bulletin.

Subject:Rear Axle Chatter Type Noise on Low Speed Turns (Excluding ZL1)

Models:2010-2012 Chevrolet Camaro (Excluding ZL1)
Equipped with Limited-Slip Differential (RPO G80)

Attention:For 2010 and 2011 vehicles built prior to August 25, 2010, if the chatter noise you are experiencing occurs only in Reverse while making a turn, please review the latest version of PIC5424.

This PI is being revised to add an Attention statement and update the Recommendation/Instructions. Please discard PI0137B.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

Caution: The rear axle seals must be replaced. The original seals are not compatible with the new fluid.

Replace both rear axle shaft seals with GM P/N 22798805 and drain/refill the rear differential with new fluid, GM P/N 88862624 (in Canada, use P/N 88862625). Refer to the Rear Axle Shaft Seal and Differential Oil Replacement procedures in SI. This fluid includes a limited-slip additive (friction modifier) already added. DO NOT add any limited-slip additive (friction modifier).
Important: Please advise the customer that once the differential fluid has been changed, it may take as long as 805 km (500 miles) for the lubricant to fully penetrate the limited slip clutch plates. During this period some chatter may still be felt on initial startup while making slow turns until the rear differential fluid warms up.

Note: DO NOT re-use the wheel drive shaft nut. Replace with NEW only.

05-15-2013, 04:55 PM	#7
Sven59 HAMMER PILOT Drives: 13 ZL1#182, 85 CJ7, 16 Silverado Join Date: Nov 2011 Location: Tucson AZ Posts: 4,387	I had mine to the Dealer twice, the first time they replaces the ring and pinion. They said the backlash was off, it was quiet for awhile and the noise came back. Next time they flushed it and refilled and it has been quiet since. Don't know if this is the universal fix but it worked for me. Below is the bulletin. Subject:Rear Axle Chatter Type Noise on Low Speed Turns (Excluding ZL1) Models:2010-2012 Chevrolet Camaro (Excluding ZL1) Equipped with Limited-Slip Differential (RPO G80) Attention:For 2010 and 2011 vehicles built prior to August 25, 2010, if the chatter noise you are experiencing occurs only in Reverse while making a turn, please review the latest version of PIC5424. This PI is being revised to add an Attention statement and update the Recommendation/Instructions. Please discard PI0137B.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 Caution: The rear axle seals must be replaced. The original seals are not compatible with the new fluid. Replace both rear axle shaft seals with GM P/N 22798805 and drain/refill the rear differential with new fluid, GM P/N 88862624 (in Canada, use P/N 88862625). Refer to the Rear Axle Shaft Seal and Differential Oil Replacement procedures in SI. This fluid includes a limited-slip additive (friction modifier) already added. DO NOT add any limited-slip additive (friction modifier). Important: Please advise the customer that once the differential fluid has been changed, it may take as long as 805 km (500 miles) for the lubricant to fully penetrate the limited slip clutch plates. During this period some chatter may still be felt on initial startup while making slow turns until the rear differential fluid warms up. Note: DO NOT re-use the wheel drive shaft nut. Replace with NEW only. __________________ "DO YOU WANT ME TO PUT THE HAMMER DOWN?"