Re: 59 Diff ratio options?
Yukon Gear sells 3:38 to 1 for the stock 55T rear end. Pull the centre section out, and swap and ring gear and pinion gear. Took my brother and I half a day to complete.
I replaced my 3:90 to 1 with the 3:38 to 1 and I am happy with the swap. My 59 GMC has the factory 235 and 3 speed. 60 mph is a nice cruising speed now. I don't think that going faster on stock brakes is wise.
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