52 Ford rear end help
Tuned
Joined: Nov 2017
Posts: 302
Likes: 44
From: Cicero, IN
Tire Rolling Radius
Some will come along to advise you of what differential you have and where to look for gear ratios but this should be the first thing you do . If you happen to have the 4.27 or 4.09 a switch to 3.54 would be noticeable . Once you know your ratio , trans ratio ( 3 sp should be 1-1 ) and tire size you can go to an online calculator to find engine rpm .
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