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I am in the process of replacing my 1986 C4 transmission filter and gasket (the car has the 700R4 auto). The gasket was baked to the pan and crumbled away, probably explaining most of my fluid leakage. I think it was original or close to it. Anyway I bought an AC Delco TF235 kit (filter and...

These are the timing marks on my 1986 C4. They don't quite match what is shown in my FSM. For one there is not rust in the diagram in the FSM. I think this is how to interpret the marking but if anyone can confirm it would be great: The valley in front of the hole is 0 degrees. The first...

I'm looking for help on two issues. 1) I think my A/C compressor clutch is beginning to fail. Is there a way to verify or check this and can just the clutch be replaced as opposed to the whole compressor (or is that not worth it)? On two separate occasions when I've started the engine with...

Hi - I have an 86 coupe and am new to the forum. Recently my HVAC system stopped blowing air. The car has an electronic control module (possible rebuilt/refurbed). I don't know if it's the C60 or C68 that I have seen referenced in the forum. The temp control seems to work fine, though it's...