| Subject: | Information on 2005 Interim Model Year Change for 4T65E (RPO M15, M76, MN3, and MN7) Transmissions |
| Models: | 2005 Buick Century, Park Avenue |
| 2005-2006 Buick Allure (Canada), LaCrosse, LeSabre, Rendezvous, Terraza |
| 2005 Chevrolet Monte Carlo, Venture |
| 2005-2006 Chevrolet Impala, Uplander |
| 2006 Chevrolet Malibu SS, Malibu Maxx SS |
| 2005 Pontiac Aztek, Bonneville |
| 2005-2006 Pontiac Grand Prix, Montana, Montana SV6 |
| with 4T65E Automatic Transmission (RPO M15, M76, MN3, and MN7) |
The purpose of this bulletin is to inform dealers of new changes for the 2005 interim model year 4T65E transmissions.
During repairs to the final drive system, the earlier design park gear bearing (695), could fall out of position and damage the final drive bearing, extension housing, or all wheel drive (AWD) case.
Effective January 31, 2005 (Julian date 5031), a new park gear (696), park gear bearing (695), and final drive sun gear shaft (689) were released for production to eliminate the possibility of the bearing falling out of the bearing pocket. The bearing
pocket on the park gear has been cut deeper to accept the thicker park gear bearing. The final drive sun gear shaft (689) was also changed to accept the new park gear and bearing.
Notice: The all wheel drive (AWD) park gear (696) is different from the front wheel drive (FWD) applications. Refer to the service parts catalog for correct model usage. Do not mix AWD and FWD park gears as damage will occur.
The new final drive sun gear shaft (689) and the park gear thrust bearing (695) are common for all applications. However, the park gear (696) is different between all wheel drive (AWD) and front wheel drive (FWD) applications.
