What transmission did Chevrolet put in their 1989 1500 silverados?
I have an 89 silverado 1500 350 V8 5.7 liter and 3rd gear in the transmission went out. I did some research and I’m pretty sure the transmission is a th400, but I just wanted to make sure and find out if there is any other transmission that would fit my engine.
They put TH400 non OD transmissions and 700r4 overdrive transmissions in those………….md
They put TH400 non OD transmissions and 700r4 overdrive transmissions in those………….md
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OWNED several
it,s either the 350 transmission or the 400. the 350 has the right corner cut off on the pan and has 13 bolts holes and the 400 has an electric downshift.
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If you want to know which transmission your truck uses, you can simply go to your GM dealer with your serial number of the truck & have them print off your truck options (RPO codes), including the type transmission you have.
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