Discussion Starter · #1 ·
Been thinking about overdrive upgrade for some time (and no, not just because my TH350 is pissing me off . . . well, not entirely anyways). I got a bead on one out of an 89 Turbo Trans Am that I'd like to throw in my 71 Chevelle. Anyone know of any issues or things to be aware of? Any compatibility issues? I'm assuming that the 89 still used mechanical speedo gears but not 100%. I welcome any input y'all might have for me.