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Old 09-16-2011, 04:26 PM   #1
wisbangman
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Join Date: Sep 2010
Location: oshkosh wi
Posts: 216
Default differencial ratios

Help ! - I just bought a 1939 ford. I would like to put a 3.54 rear end in it . Could some one tell me how to determine my current ratio ? I read in the 1938/39 book that there are stampings on the differencial housing that will tell what is in the car, anyone know about this ? I also read that there are 6 and 10 spline units - any info on what a 39 ford would have ? Any one have one for sale ?...thanks, barners
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