GM Service Manual Online
For 1990-2009 cars only

Rumble Type Noise on Acceleration (Adjust Transmission Support)

Subject:Rumble Type Noise on Acceleration (Adjust Transmission Support)

Models:2004-2008 Cadillac SRX
2005-2008 Cadillac STS
2008 Cadillac CTS
with All Wheel Drive (RPO MX7)



This bulletin is being revised to update the correction information. Please discard Corporate Bulletin Number 07-07-30-029A (Section 07 -- Transmission/Transaxle).


Condition

Some customers may comment on a rumble type noise heard on acceleration.

Cause


Object Number: 2037963  Size: SH

This noise may be due to a ground out condition between the transmission support and the mount.

Correction

Adjust the transmission support to eliminate the ground out condition using the procedure below.

  1. Loosen the four transmission support to body bolts.
  2. Loosen the two mount to transfer case bolts.
  3. Position the transmission support so that it is parallel to the body.
  4. Re-torque the two mount to transfer case bolts. Tighten the passenger side mount to transfer case bolt first, then the driver side.
  5. Tighten
    Tighten the bolts to 110N·m(81 lb ft).


    Object Number: 2037910  Size: SH
  6. Shift the transmission support as far rearward as possible.
  7. Re-torque the four transmission support to body bolts.
  8. Tighten
    Tighten the bolts to 60N·m(44 lb ft).

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time

K9802*

Adjust Transmission Support to Eliminate Ground Out Condition

0.5 hr

*This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide.