Question on rear axles... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jorgensensc · 03-21-2007, 09:13 PM

The truck I just got from a fellow board member (70 rs/ss) has front crossmember conversion off a 73-87 truck.. so 5 lug. The rear is a 6 lug off a '68 I think. (truck is a '68, but the rear axle isn't original, had 3.08s, he changed to 3.73s)
First qustion. What is the length from flange to flange on the pre 71 rear, and what is the length on the 71 and 72s? I would like to measure to make sure I know what rear I have. Did 71s and 72s have 6 lug coil spring in the 3/4 tons?

Second Question. Can I get the original axles redrilled for 5 lug? Or should I just spend the money on new axles.If so who has good prices? Money is kinda tight, and 70 rs/ss is going to send me some rallyes so he can get his tires and rims back that are on the truck now. They go to a couple of other projects he has, he just wanted to make sure that I had good tires for the drive home (what a guy!)

I will get pics as soon as I can! I know y'all want to see. I can say that the 1400 mile trip went off without a hitch. And I got about 14 mpg going 75-85 the whole way. Damn 2 barrels are cool!!
Thanks guys!
Shawn

03-21-2007, 09:13 PM	#1
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	Question on rear axles... The truck I just got from a fellow board member (70 rs/ss) has front crossmember conversion off a 73-87 truck.. so 5 lug. The rear is a 6 lug off a '68 I think. (truck is a '68, but the rear axle isn't original, had 3.08s, he changed to 3.73s) First qustion. What is the length from flange to flange on the pre 71 rear, and what is the length on the 71 and 72s? I would like to measure to make sure I know what rear I have. Did 71s and 72s have 6 lug coil spring in the 3/4 tons? Second Question. Can I get the original axles redrilled for 5 lug? Or should I just spend the money on new axles.If so who has good prices? Money is kinda tight, and 70 rs/ss is going to send me some rallyes so he can get his tires and rims back that are on the truck now. They go to a couple of other projects he has, he just wanted to make sure that I had good tires for the drive home (what a guy!) I will get pics as soon as I can! I know y'all want to see. I can say that the 1400 mile trip went off without a hitch. And I got about 14 mpg going 75-85 the whole way. Damn 2 barrels are cool!! Thanks guys! Shawn __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE



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