by Wilson Kirkendall

Created on: December 12, 2009

Replacing a General Motors Torque Converter Clutch solenoid.

The torque converter clutch solenoid is a hydraulic control valve which is used to control the torque converter clutch. Introduced in the early 1980’s there have been many different solenoid designs used in virtually all the GM automatics both front and rear wheel drive for the past 30 years.

Often when the solenoid goes bad it gets plugged, or stuck in the closed position.  This will cause the torque converter clutch to stay engaged, or locked up, when it should be released. This will cause the engine to shutter, and often stall at a stop. This may also be accompanied by a check engine light.

The degree of difficulty in replacing the solenoid depends upon the particular transmission model you are working on. This article will address each model, the procedures involved, and tips and precautions.

 Before you begin you will need the following: Transmission pan gasket, replacement transmission filter, replacement torque converter solenoid, necessary tools and enough replacement transmission fluid to refill the transmission when you are done with the job.These items are available at most auto parts stores. My personal recommendation for the solenoid itself is the Rostra brand. The Rostra brand is specifically designed for the aftermarket replacement industry and offers features and benefits to make installation quick and easy.

GM Rear wheel drive units 700R4, 2004R, 4L60:
With a cool vehicle, begin by removing the transmission oil pan. It is a good idea to keep 2 bolts inserted into diagonally opposite corners, and to gradually remove them to avoid spillage of the transmission fluid. The pan will contain several quarts of transmission fluid, so have an adequately sized catch pan.

Usually the old pan gasket will stick to the oil pan, this must be completely removed. Any remnants of gasket on the transmission case need to be cleanly removed as well. Use a gasket scraper. Now is a good time to clean the inside of the oil pan of the metallic debris and contamination stuck on the pan magnet.  Once most of the fluid has drained from the transmission case, you can remove the old filter by pulling it downward. Be sure the seal on the filter neck comes out with the filter, if not reach into the bore and remove the seal.

Under the filter, near the front of the transmission, you will find the solenoid. Remove the two mounting bolts that hold the solenoid to the case. Follow your replacement solenoid

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