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Sonnax offers two solutions for excessive endplay in GM 400, 425, 4L80-E and 4L85-E units. Sonnax rear unit endplay shim 34006-05 can be stacked under the four-tab metal thrust washer on the rear of the output shaft flange to set unit endplay in the same manner as the OE selective three-tab spacers. These shims eliminate the need to stock expensive or hard-to-find OE three-tab spacers and are an alternative to Sonnax shim 34500-Z. Shimming at this location maintains the stack-up height between the gear train main shaft and sun gear shaft.
December 23, 2015
Topics: Diagnostics And Theory Transmission GM 400 Transmission 4L80-E Transmission 4L85-E TransmissionRead Now