Automatic Transmission Fluid Leak at Rear of Vehicle (Replace Rear Output Shaft Seal With New Design Seal)

Some customers may comment on a fluid leak from the rear of the vehicle. This condition may be more likely to occur when the temperatures are below freezing.

The rear output shaft seal (106) may take a set in cold weather, allowing the seal to leak.

1. Diagnose the source of the fluid leak. Refer to Fluid Leak Diagnosis (SI Document ID #403256).

•	If diagnosis of the transmission fluid leak determines that the leak is from the rear output shaft seal (106), continue with the next step.

•	If diagnosis of the transmission fluid leak determines that the leak is from a location other than the output shaft seal (106), continue with the appropriate service procedure.

2. Remove the transmission from the vehicle. Refer to Transmission Replacement (SI Document ID #710311).

Parts are currently available from GMSPO.

For vehicles repaired under warranty, use: