Bravada V6-262 4.3L VIN Z (1991)
DATE OF PRODUCTION CHANGE:
On January 05, 1993 (Julian Date 005) HYDRA-MATIC 4L60-E transmissions were built with an improved design 3-4 clutch. The improved design
consisted of combining the 3rd and 4th clutch ring retainer plate (III. 652), the 3rd and 4th clutch apply (stepped) plate (III. 653) and the 3rd and 4th
clutch (steel) plate (III. 654C) into one 3rd and 4th clutch apply plate (III. 653) Figure 1. The 3rd and 4th clutch steel plates are also thicker and the
backing plate selection has changed as noted in Figure 2.
FIBER PLATE USAGE FOR 1991-92 4L60 OVERHAUL KITS
In the overhaul repair kits for the HYDRA-MATIC 4L60 there are two (2) sets of 3rd and 4th clutch fiber plates. The two 3rd and 4th clutch fiber plates
are calibration sensitive and interchanging the wrong plates may cause premature failure. The following chart shows which models should use the plates
labeled "2050" Figure 3.
1991
1992
1AAM
2ADM
1APM
2AKM
1CNM
2BFM
1CYM
2CHM
1FYM
2CJM
1KWM
2FUM
1LHM
2KJM
1RCM
2LHM
1RDM
2WCM
1YHM
2YCM
2YDM
