G6 L4-2.4L (2007)
Input Shaft: Customer Interest
A/T - Binding on 3-4 or 4-3 Shift/MIL ON/DTC P0797 Set
Bulletin No.: 07-07-30-022
Date: September 12, 2007
TECHNICAL
Subject:
6T75 Automatic Transmission Binding on 3-4 or 4-3 Shift, Check Engine Light On, DTC P0797 Set (Measure Side Clearance Between Hub Seal Rings
and Groove, Replace Hub and Hub Seal Rings if Necessary)
Models:
2008 Buick Enclave
2007 GMC Acadia
2007 Pontiac G6
2007 Saturn AURA, OUTLOOK
with 6T70/6T75 Automatic Transmission (RPOs MHZ, MH6, MY9)
Built Prior to June 15, 2007
Attention:
Use GMVIS to determine the build date.
Condition
Some customers may comment on a binding condition on a 3-4 shift or 4-3 shift. Most often the shift concern will be noticeable when the transmission
fluid is hot and may be accompanied by a check engine light and DTC P0797.
Cause
This condition may be caused by a poor surface finish on the case cover hub seal ring grooves, causing seal wear resulting in a leak between the 3-5
Reverse and 4-5-6 clutch fluid passages.
Correction
Remove the transmission from the vehicle using the transmission replacement procedure in SI.
Remove the case cover assembly. Refer to the Case Cover and 3-5 Reverse and 4-5-6 Clutch Housing Removal procedure in SI.
Remove the hub (input shaft support) from the cover.
Install the new hub with the seals installed to the case cover.
A new case cover gasket is not required unless damaged.
Install the case cover assembly to the transmission. Refer to the Case Cover Assembly Installation procedure in SI for proper bolt tightening sequence
and torque.
