A/T - 4T65E Engineering Changes
File In Section: 07 - Transmission/TransaxleBulletin No.: 02-07-30-041
Date: October, 2002
INFORMATION
Subject:
Engineering Changes for the 2003 Model Year, 4T65E Transaxle
Models:
2002-2003 Buick Century, LeSabre, Park Avenue, Regal, Rendezvous
2002-2003 Chevrolet Impala, Monte Carlo, Venture
2002-2003 Oldsmobile Aurora, Silhouette
2002-2003 Pontiac Aztek, Bonneville, Grand Prix, Montana
with 4T65E Transaxle (RPOs MN3, MN7, M15, M76)
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.
The TFP shown on the right (3) in the illustration above 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.
The manual shaft and lever assembly shown 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.
DISCLAIMER