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Old 09-20-2010, 07:28 AM
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What size rear end do I have?

My RE came out of a 1991 S-10, 4 x 4, I have got it on jacks and as best as I can tell by turning the wheel and watching my axle, rear it goes around almost exacly 2 x"s with my wheel going around once (1). What size do I have? Also my cover has 10 bolts if that matters! Advise, thanks Dana
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Old 09-20-2010, 08:13 AM
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It's probably the 7.5 10 bolt. I'm not sure what year they started using the 8.5 in the ZR2 and some other S trucks, but I think all '91s got the 7.5. If you are only turning one wheel and the other wheel is not turning then you must turn the wheel exactly 2 full turns with the other wheel held exactly still. That will give you the gear ratio.
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Old 09-20-2010, 10:31 AM
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Quote:
Originally Posted by big gear head
It's probably the 7.5 10 bolt. I'm not sure what year they started using the 8.5 in the ZR2 and some other S trucks, but I think all '91s got the 7.5. If you are only turning one wheel and the other wheel is not turning then you must turn the wheel exactly 2 full turns with the other wheel held exactly still. That will give you the gear ratio.
I am glad you posted that , gearhead . I always wondered how to get it right when only one wheel turns . I knew it wasn't anywhere close on only one revolution of the wheel . I had rolled my T-bucket with both wheels on the ground and counted the revs of the driveline . Now I know the easy way .
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