Engineering Changes For The 2003 Model Year, 4T65E Transaxle (02-07-30-041)
Publication date: 2002-10-01Reference number: 02-07-30-041
ENGINEERING CHANGES FOR THE 2003 MODEL YEAR, 4T65E TRANSAXLE
TECHNICAL SERVICE BULLETIN
Reference Number(s): 02-07-30-041, Date of Issue:
October 2002
| BUICK: | 2002-2003 Century, LeSabre, Park Avenue, Regal, Rendezvous with 4T65E Transaxle (RPOs MN3, MN7, M15, M76) |
| CHEVROLET: | 2002-2003 Impala, Monte Carlo, Venture with 4T65E Transaxle (RPOs MN3, MN7, M15, M76) |
| OLDSMOBILE: | 2002-2003 Aurora, Silhouette with 4T65E Transaxle (RPOs MN3, MN7, M15, M76) |
| PONTIAC: | 2002-2003 Aztek, Bonneville, Grand Prix, Montana with 4T65E Transaxle (RPOs MN3, MN7, M15, M76) |
| SECTION: | 07 - Transmission/Transaxle |
SERVICE INFORMATION
CHANGES FOR THE 4T65E TRANSAXLE FOR THE 2003 MODEL YEAR
NEW PRESSURE CONTROL SOLENOID
IMPORTANT:
The physical dimensions will allow usage of the new solenoid in past model transaxles or the old solenoid in the 2003 model transaxles. They should not be interchanged. Interchanging of the pressure control solenoids will result in improper shift characteristics, customer dissatisfaction and additional repairs.
The new pressure control solenoid is shown on the right (2) in the illustration above, (Fig 1 ).
NEW TRANSMISSION FLUID PRESSURE SWITCH (TFP)
The TFP shown on the right (3) in the illustration above (Fig 2 ) is new for the 2003 model year. It has a new electrical connector and subsequently the transaxle's internal wiring harness has changed also. The TFP for the 2003 model year only has a TCC release switch. The TFP can not be interchanged and should be serviced with only the correct parts for the year of the transaxle.
NEW MANUAL SHAFT AND LEVER ASSEMBLY
The manual shaft and lever assembly has been changed for the 2003 model year. This component may be used in past model vehicles.
ADDITIONAL CHANGES
- New torque signal regulator spring in the valve body. This is not to be used with past models.
- New internal mode switch (IMS). This is not to be used with past models.
- New pump assembly. This is not to be used with past models.
- New valve body assembly. This is not to be used with past models.