10-04-20-001F

File in Section:
Bulletin No.:
Service Bulletin
Date:
04 - Driveline/Axle
10-04-20-001F
November, 2014
TECHNICAL
Subject:
Rear Axle Clunk and/or Chatter Type Noise on Turns (Drain/Refill Rear Differential
Fluid)
Models:
2003-2014 Cadillac CTS, Sport Wagon and Coupe (Including V-Series and Export)
2015 Cadillac CTS Coupe (VIN D)
2004-2009 Cadillac SRX (Including Export)
2005-2010 Cadillac STS (Including V-Series and Export)
Equipped with Limited Slip Differential (RPO G80)
This bulletin has been revised to add the 2014-2015 Model Years and update the Labor
Operation to the Global Labor Code (GLC). Please discard Corporate Bulletin Number
10-04-20-001E.
Condition
Some customers may comment on a clunk and/or chatter type noise from the rear of the vehicle while making turns.
This condition may be worse on vehicles built prior to the 2008 model year. Carbon-faced clutch plates were
introduced into production in the 2008 model year and have decreased the likelihood of the clutch plate chatter.
Cause
This condition may be caused by slip/stick of the posi-traction clutch plates due to insufficient limited-slip axle
additive. As plates slip and stick, a jumping or jerking feel occurs accompanied by a clunk noise.
Correction
Important: DO NOT remove the differential cover. It is not necessary to flush the old fluid from the differential.
Drain and refill the rear differential with fluid, GM P/N 88862624 (in Canada, 88862625). Refer to the Axle Lubricant
Change procedure in SI.
This fluid includes a friction modifier already added with a different formulation that lasts longer and does not break
down over time.
Lubrication Specifications
Application
Quantity
Metric
English
Without Differential Oil Cooler
1.1 L
1.16 Qt
With Differential Oil Cooler (Sedan/Wagon)
1.41 L
1.50 Qt
With Differential Oil Cooler (Coupe)
1.8 L
1.9 Qt
Parts Information
Part Number
Description
88862624
(U.S. – 1 qt)
88862625
(Canada – 1 L)
DEXRON® LS Gear Oil
Warranty Information
For vehicles repaired under the Bumper-to-Bumper coverage (Canada Base Warranty coverage), use the following
labor operation. Reference the Applicable Warranties section of Investigate Vehicle History (IVH) for coverage
information.
Labor
Operation
Description
Labor
Time
3080098*
Drain & Refill Rear Axle Fluid
0.6 hr
*This is a unique Labor Operation for Bulletin use only. It will
not be published in the Labor Time Guide.