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Re: 83 12 Bolt Posi in a 72?
Quote:
Originally Posted by Tomchev
Trucks used the 12 bolt through 1982.
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You're right. I just read in my 1982 shop manual that 10-30 series trucks used 7 different rear axles, categorized by ring gear diameter. They were 8.5" (10-bolt), 8.875" (12-bolt), and all the way up to a DANA 10.5".
My 82 C10 had the 8.5" 10-bolt. I suspect a step-up or two in GVWR got you the 12-bolt as part of the package. Maybe even in a C10.
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Mike
1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- sold
1981 C10 Silverado LWB -- sold, but wish I still had it!
1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming.
Retired as a factory automation products salesman.
Worked part-time over the years for an engine builder and a classic car repair shop.
Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
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