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09-23-2006, 05:19 PM
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1980 chevy rear end?
I have a 71' C10 chevy truck
355ci 400hp;415ft/lbs torque Tremec 5spd I pulled a 1980 chevy 1/2 ton rear end.Because I liked the gearing.I was wondering if I put it under my 71' if it will hold up?I plan to install a powertrax diff. in it also.If not do you know of any rear ends that will hold up?I have a ford 9" but I wanted to keep the chevy bolt pattern.Thanks Bonzipenguins 
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09-24-2006, 10:01 PM
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It probably won't bolt up. '71s generally had coil springs, and '80s had leaf springs. Other than that, they're the same inside.
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09-25-2006, 12:30 AM
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my truck has leaf springs.The saddles need to be moved 2 inches outside to fit.
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09-25-2006, 12:51 AM
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12-bolts came with 30-spline axles and 10-bolts used to come with 28-spline axles. It doesn't sound like a big difference but a 30-spline is actually about 32% stronger then a 28-spline.
In 88 GM went to 30 spline axles in the 8.5" 10-bolt. When you get your new diff just get a 30-spline one. You can use junkyard axles out of a K5 or Sub from 88-91 or get aftermarket axles.
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09-25-2006, 08:13 PM
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Thanks Triaged.I'll definately do that my next trip to a pick-a-part.
Regards, Bonzipenguins
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