There is no such thing as 3.55 gears for a Eaton HO52/72. The highest gears that were made were 4.10's.
I agree with Clyde65. You will be far better off changing to either a 14 bolt or a Dana 60. There is all sorts of aftermarket parts support for those two differentials, whereas there is basically nothing for the Eaton.
Quote:
Originally Posted by Ronsmith
I've got the ho 72 in a 1962 GMC the truck only has 55,000 miles on it and I plan to put it on airbags and just make a driver out of it. I want to keep the stock transmission the stick shift but I would like to put a better gear ratio in the rear so that I can drive it on the highway and not turn so many RPMs does anybody know where a guy could find a replacement carrier and a ring and pinion to put like a set of 355 gears in there
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