Specifications

Subject: Rear Axle Chatter Shudder On Turns -
keywords bind differential
#PIP3559C - (10/13/2006)
Document ID# 1866944
2006 Chevrolet Corvette
2004 - 2007 Cadillac XLR
2006 - 2007 Cadillac XLR-V
1999 - 2007 Chevrolet Corvette, Corvette Z06
The following diagnosis might be helpful if the
vehicle exhibits the symptom(s) described in this
PI.
Condition/Concern: Rear axle chatter or shudder on
turns on Chevrolet Corvette and Cadillac XLR.
Recommendation/Instructions:
If this is the first complaint for this condition flush
and fill the rear axle with synthetic axle lubricant
GM P/N 12378261 (P/N 12378261 has been
replaced with P/N 89021677), (Canadian P/N
10953455) and appropriate amount of the friction
modifier additive P/N 01052358 (in Canada
992694). See fluid amounts listed below.
Note 1: To properly flush the rear differential
remove the cover and get all of the old fluid out off
the differential, wipe out the residue and then
reinstall the cover and replace the fluid and
additive.
If this is a repeat complaint or the condition
persists after the flush and fill, replace the
right and
left rear axle clutch packs following published
service procedures.
After clutch pack replacement use synthetic axle
lubricant GM P/N 12378261 (Canadian P/N
10953455). and the appropriate amount of friction
modifier additive P/N 01052358 (in Canada
992694). See fluid amounts listed below.
Note 2: PRIOR TO INSTALLING THE FRICTION
MODIFIER ADDITIVE FOR EITHER OF THE ABOVE
REPAIRS THE BOTTLE MUST BE SHAKEN
VIGOROUSLY FOR AT LEAST 1 MINUTE TO MIX THE
ADDITIVE THOROUGHLY.
Once the axle fluid has been changed the car must
be driven in 8 - 10 SLOW figure eights to work the