Thread: Differential
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Old 09-20-2017, 03:14 PM   #5
Bigdav160
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Join Date: Apr 2011
Location: Klein Texas
Posts: 3,852
Re: Differential

1972 ended the use of the Eaton HO52 axle in GM vehicles. It was only available in 4.11 and 4.56:1 ratios. I don't believe there are any aftermarket gearsets.

Your best choice would be convert to an overdrive transmission for better drivability.

In my Suburban, I installed a '75 GM corporate 14 bolt with a 3.73:1 gear and a 700R4 overdrive transmission.

Perhaps not the greatest combination for performance but it works well for me.
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