1970 3/4 Ton Posi Swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70C20TPI · 10-24-2003, 10:03 PM

Does anybody know which years of rear differentials are interchangeable with a 70 3/4 ton 2wd? I want to swap my non-posi corporate 10-bolt out for a posi unit. The only local differential with posi that I can find is a 10 bolt from a 66 3/4 ton. Both vehicles have coil springs. Would it be intechangeable? Alternatively, does anybody have a posi differential for sale in or close to Utah that would swap in without modifications?

10-24-2003, 10:03 PM	#1
70C20TPI Registered User Join Date: Oct 2003 Posts: 1	1970 3/4 Ton Posi Swap Does anybody know which years of rear differentials are interchangeable with a 70 3/4 ton 2wd? I want to swap my non-posi corporate 10-bolt out for a posi unit. The only local differential with posi that I can find is a 10 bolt from a 66 3/4 ton. Both vehicles have coil springs. Would it be intechangeable? Alternatively, does anybody have a posi differential for sale in or close to Utah that would swap in without modifications?



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