GM S10/S15/Sonoma Pick-Ups 1982-1993 Repair Manual

Identification

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The Turbo Hydra-Matic (THM) 180C and 200C transmission are fully automatic transmissions which provide 3 forward gears and a reverse gear.

The Turbo Hydra-Matic (THM) 700-R4 and 4L60 transmissions are fully automatic transmissions which provide 4 forward gears and a reverse gear. The oil pressure and shifting points are controlled by the throttle opening, via a Throttle Valve (TV) cable.

The Hyra-Matic 4L60-E transmission is an electronically controlled fully automatic transmission which provides 4 forward gears and a reverse gear. Oil pressure and shifting points are controlled by the PCM through a series of solenoid valves and sensors.

For more information regarding serial number and transmission identification, please refer toChapter 1of this manual.

 
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