- Apr 11, 2005
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I am going to be purchasing a tremec 600 for my 67 fastback which has 390 engine probably around 400HP. I am running 3.73 gears in the back and would like to install a 5 gear tranny so that when I go to shows that are farther away, the engine is not reving to high and screaming. My question is which overdrive gear ratio would be better? They have a .82 overdrive and .64 overdrive. I was thinking the .64 would be better for highway driving. Just slap it in 5th and go. But for some reason, that is cheaper than the .82. Anyone know what the reason is for this? Any suggestions for one or the other? Thanks guys.
Jon
Jon