ENG. STALL WHEN SHIFT TO REV. OR DRIVE AFTER RESTART

ALL 1981-87 GAS MODELS AND 1982-85 MODELS/YEARS MODELS WITH A 4.3L DIESEL ENGINE EQUIPPED A THM 125C

This bulletin replaces Dealer Technical Bulletin 87-T-57A which can be discarded. This bulletin is being revised to include 1982-85 models with the 4.3L diesel engine and the solenoid and conduit assembly part numbers for models equipped with the 4.3L engine.

BULLETIN COVERS: (Figure 1)

A new torque converter clutch (TCC) solenoid, which has an internal rubber seal that will prevent sediment from sticking to the electromagnetic portion of the solenoid, is in production in all 1987 THM 125C models built after Julian date 160. The new solenoid will reduce the potential of TCC Solenoid sticking and the resulting condition of the engine stalling while shifting into reverse or drive.

DATE OF PRODUCTION CHANGE: (Figure 2)

Beginning June 9, 1987 (Julian date 160), all 1987 THM 125C Transaxles were produced with the new solenoid.

IMPORTANT: Some Cutlass Ciera models equipped with Windsor transaxles built between February 15th and February 25th, 1987 (Julian dates 049 - 056) may have suspect torque converter clutch (TCC) solenoids. The suspect previously equipped solenoids, may stay applied after transaxle has been operated at normal operating temperatures. This condition could result in engine stall while engaging reverse or drive range.

SERVICE ACTION: (Figure 3)

The new solenoid can be used to service all past THM 125C transaxle models. Remove the side cover and replace the solenoid and conduit assembly (on-car service).

SERVICE PARTS INFORMATION:

8665016 Solenoid and Conduit Assembly - 1988 KDC Model Only 8652379 Solenoid and Conduit Assembly - All Other Models

Cars equipped with the 4.3L diesel engine should use the following parts:

8652377 Solenoid and Conduit Assembly - 1982-84 Models 8652376 Solenoid nd Conduit Assembly - 1985 Models

SERVICE NOTES:

To properly diagnose the condition of the suspect Windsor built transaxles, assure that stabilized operating temperatures are obtained during normal road evaluation phase of routine preliminary predelivery procedure.

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.