GM Astro/Safari 1985-1996 Repair Guide

Automatic Transmission

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See Figures 1 and 2



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Fig. Fig. 1: Location and description of the THM-R4 (4L60) transmission serial number-early-model vehicles (1985-92)



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Fig. Fig. 2: Location and description of the 4L60-E transmission serial number-late-model vehicles (1993-96)

The Turbo Hydra-Matic 700-R4 (also known as the 4L60 on models through 1992) and their electronically controlled cousin the 4L60-E (1993-96) 4-spd automatic transmission serial numbers are located on the rear right side of the transmission case, above the oil pan.

 
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