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125 THM Also known as 3T40 Used 1980-81. The 1982-up version was called 125C and had an electronically controlled lock-up torque converter. There were MANY versions and were used in various GM models as well as some Isuzus. This was an hydraulically controlled front wheel drive three speed transmission. Top cooler line is the cooler return line. Band adjustments:
Gear Ratios:
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    Transmission (click on picture to enlarge)
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 Pan gasket (click on picture to enlarge)
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