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Discussion Starter · #1 ·
I"m going to change out my rebuilt 2 speed fordomatic witha 70-80 model c4. My question is
What is the differance in RPM at 60 mph? I had a guy from a transmission shop say that the drive gears are the same. (2nd in the two speed is the same as 3rd in the three speed). I don't know if it is the same or not. I might think about swapping out the 3.00 rear end with another.

Thanks
Brett
 
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