The Ford Barn - View Single Post - 3.78 vs 3.54 rear end and speedometer/miles

Terry, NJ · 08-19-2020, 08:01 AM

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

08-19-2020, 08:01 AM	#9
Terry, NJ Senior Member Join Date: May 2010 Location: Bucks Co, Pa Posts: 3,740	Re: 3.78 vs 3.54 rear end and speedometer/miles 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 Last edited by Terry, NJ; 08-19-2020 at 08:15 AM.