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#1
06-23-2026, 09:51 AM
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AC add-on 1-groove pulley - which direction does it mount?
Replacing my front main seal and balancer... didn't pay attention to the pulley mounting when I took the crank and AC add-on pulley.
Does anybody w/ a 400 and AC remember what direction or can check their AC pulley? Because both sides aren't exactly alike. I want to say that the side with the convex raised center go against the balancer, while the side with the concave center faces the back of the crank pulley, but I don't know for sure. I know that it wouldn't be that big a deal to just bolt it down one way and check to see if the AC belt is aligned like it was before, but I'm just seeing if anybody knows off the top of their head. Pic for reference: Concave center:  Convex center: 
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1979 Trans Am W72 400/4-Speed WS6 - Starlight Black Hardtop  |
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