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Old 08-19-2020, 06:37 PM   #10
1930-Pickup
Senior Member
 
Join Date: Mar 2017
Location: southern California
Posts: 725
Default Re: 3.78 vs 3.54 rear end and speedometer/miles

Quote:
Originally Posted by Terry, NJ View Post
A 3.54! One of the best things I ever did! Rebuilding the rear is a PITA, however it's worth it. If you live in a flat area and have a strong engine, you can go to a 3.27. I am in a very hilly area, so I played it safe and went for the 3.54. The amazing thing is, it climbs the hills around here better than the old 3.78. My engine mods are just a head cut .040 and a "B" carb with a bored out manifold. Yes, there's some improvement, but no one would call it a "Hot Rod". It's more of a dream on the highway. I gave up nothing and gained on all counts. Yes, By all means do it. Be sure to follow Tom Endy's tutorials on Rebuilding ford differentials. It's not a simple process!
Terry
That's a heck of an endorsement. I've been wondering about what ratio to go with also. 3.54 sounds good, especially because I have 4.11 now.
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