RELAY AWD V6-3.5L VIN L (2006)
Differential Clutch: All Technical Service Bulletins
Drivetrain - Moan/Groan Noise From Rear Differential
Bulletin No.: 06-04-114-001A
Date: May 08, 2006
TECHNICAL
Subject:
Moan/Groan Type Noise from Rear Axle During Parking Lot or Turning Maneuvers (Perform All-Wheel Drive (AWD) System Function Tests and
Drain/Refill/Drive Procedure)
Models:
2002-2006 Buick Rendezvous
2005-2006 Buick Terraza
2002-2005 Chevrolet Venture
2005-2006 Chevrolet Uplander
2002-2004 Oldsmobile Silhouette
2001-2005 Pontiac Aztek
2002-2005 Pontiac Montana
2005-2006 Pontiac Montana SV6
2005-2006 Saturn Relay
with Versatrak(R) All-Wheel Drive (AWD) System
Supercede:
This bulletin is being revised to correct fluid quantities in the Parts Information. Please discard Corporate Bulletin Number 06-04-114-001 (Section 04 -
Driveline/Axle).
Condition
Some customers may comment on a moan or groan type noise coming from the rear axle during parking lot or turning maneuvers. The "AWD Disable"
light should not be illuminated with this condition. Verify that the noise is originating from the rear axle with the chassis ears and/or by using a long
rubber hose installed on the rear axle vent and held up to your ear.
Cause
This condition may be caused by a slip-stick condition between the friction and reaction plates in the clutch pack unit. This may be the result of wear or
excess moisture within the unit.
Correction
Perform the all-wheel drive (AWD) system function tests and the drain/refill/drive procedure listed below.
1.
Disconnect the clutch pump actuator check valve connector. If the noise is eliminated, proceed to step # 2. If the noise is still present with the
check valve disconnected, the condition may not be from the rear axle. The valve connector needs to be connected before continuing.
2.
Verify that the tires are all the same size, make, and adequate tread depth. Repair as necessary. Drive the vehicle and re-evaluate the original
concern and see if it is repaired. If not, continue with step # 3.
3.
Perform the AWD System Functional Inspection tests as described in the published Service Information. If the system fails any of the functional
tests, replace the rear axle assembly. Please document on the repair order which test or tests the system failed. If the system passed the functional
tests, continue with step # 4.
4.
Drain and Refill the rear axle with the recommended fluid, P/N 12378514 (88901045 in Canada), as described in the published service procedures.
5.
Drive the vehicle for 20 minutes and perform the following maneuvers:
^
A: Drive a tight RH circle for 5 minutes.
^
B: Drive a tight LH circle for 5 minutes.
^
C: Repeat steps A and B.
