Clunk Bump Condition Shifting Drive to Reverse / Reverse To Drive - keywords 5L40E 5L50E AWD
| Subject: | Clunk Bump Condition, Shifting Drive to Reverse / Reverse to Drive |
| Models: | 2004-2007 Cadillac SRX |
| 2005-2007 Cadillac STS |
| Equipped With a 5L40E/5L50E Transmission and AWD |
This PI Supercedes To Add Models. Please Discard PIO1976.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Condition/Concern:
The All Wheel Drive (AWD) Cadillac SRX and STS may exhibit a condition of a clunk bump noise when completing range shifts of drive to reverse and reverse to drive. The condition may be intensified by abruptly accelerating before the transmission is fully engaged into range. The clunk bump condition is a result of internal lash build-up within the transfer case and driveline.
Recommendation/Instructions:
This condition is considered to be a characteristic of the AWD system. The vehicle should be compared to a like vehicle with similar mileage. Attempts to repair this condition have been proven unsuccessful.
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.
