I am swaping axles from a '72 3/4 ton pu to my '71 sub. According to my calculations and talking with others this is a direct swap. The Eaton rear end is strong and the 3/4 tons came with 4.11 or 4.56 gears. Hard finding a locker for the Eaton rear though.
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Bob Chayer
71 3/4 ton 4X4 Suburban
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