Producing a quality rebuilt torque converter is a major accomplishment. You have to correctly perform many rebuild procedures to end up with a quality finished product. Simply knowing the difference between the right and wrong way of doing a rebuild procedure doesn’t always guarantee success. It’s important to pay attention to the many details of the rebuild, and the proper use of shims is one such detail.
When torque converters were first introduced, all of the torque converters were bolted together. Rebuilding the early torque converters was done in transmission shops by transmission rebuilders. The only information they had available was found in the factory shop manuals. Those shop manuals included the torque converter in the transmission section, and the factory support for the early torque converters was very good. The original equipment manufacturers supplied selective shims and wear plates in many different thicknesses. Of course, at that time all but the Packard and Studebaker converters were non-lockups, and endplay was the only adjustment that the builder had to be concerned about. The builder would still grumble when he had to put the converter together with two or three bolts, check the endplay, and select the appropriate selective thrust washer. In the early Ford MX and Chevrolet Powerglide converters, the endplay was adjusted by using selective thrust washers between the turbine and cover or between the stator and impeller.
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Article No.: TCTIP-03-08
Author: Ed Lee
Total Pages: 2
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