For 1990-2009 cars

# Shudder Or Bind On Low Speed Turns - keywords axle differential groan growl moan noise rear shudder slow vibration

Subject: | Shudder or Bind On Low Speed Turns

Models: | 2004-2007 Cadillac SRX, CTS, CTS-V

| 2005-2007 Cadillac STS

| 2006-2007 Pontiac Solstice

| 2007 Saturn Sky

| Equipped with Limited Slip Differential (RPO - G80)

This PI is being superseded to update recommendations. Please discard PIP3152H.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

### Condition/Concern:

Customer may comment of a shudder or bind from the rear of vehicle on low speed turns such as parking lot maneuvers on vehicles equipped with G80 limited slip rear axle. This condition may be more noticeable with the vehicle at operating temperatures.

### Recommendation/Instructions:

Drive the vehicle to warm the rear axle and then drain the axle fluid. Refill with just the 89021677 (in Canada, use 89021678) axle lube and drive the vehicle about 10 minutes performing mostly parking lot turning maneuvers. Drain the rear axle again and mix 1200 ml of 89021677 (in Canada, use 89021678) and 74-89 ml of 1052358 (Canadian P/N 992694) additive outside of the axle and then fill the rear axle with this mixture and re-evaluate.

If the noise returns or continues replace the rear differential right and left clutch packs using the Limited Slip repair procedure listed in eSI. Prior to installation of the clutch plates soak the plates for at least one hour in the additive part number 1052358 (Canadian P/N 992694). Wipe the excess additive from the new clutches before installing them. Fill the rear axle with the mixture as described above after clutch installation.

Part numbers are subject to change. Use any superseded part numbers if the part numbers in this document become discontinued.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.