INTERMITTENT AND/OR NO TORQUE CONVERTER CLUTCH APPLY
TRANSMISSION APPLICATIONS: SUBJECT:
1989 THM 125C/HYDRA-MATIC INTERMITTENT OR NO TORQUE CONVERTER 3T40 (MD9) CLUTCH APPLY
TRANSMISSION MODELS: VEHICLE APPLICATIONS:
ALL A,J,L,N,T CARS
Bulletin Covers:
Intermittent Torque Converter Clutch Apply and/or No Torque Converter Clutch Apply due to Solenoid Assemblies (333) that may be inoperative.
DATE OF PRODUCTION CHANGE: (Figure 1) -------------------------- Suspect solenoids will have the following production dates stamped on the solenoid body: 258, 268, 278, 288.
Solenoid assemblies produced before and after these dates are not affected.
SERVICE ACTION:
Refer to Section 6E3-C8 Torque Converter Clutch (TCC) System and Section 7 Transaxle Diagnosis Section of your service manual to verify if the solenoid assembly is functioning properly.
Do not attempt to repair suspect solenoid assemblies.
If an inoperative solenoid assembly is found in any THM 125C/HYDRA-MATIC 3T40 replace it with a new one.
SERVICE INFORMATION:
Refer to the following part number when replacement of the solenoid assembly is necessary.
Part No. Description -------- ----------- 8652379 Assembly, Solenoid and Conduit
SERVICE MANUAL REFERENCE:
Whenever servicing a solenoid assembly on any THM 125C/HYDRA-MATIC 3T40 refer to the Unit Repair Section of your service manual.
General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.
