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11-22-2009, 10:45 PM
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#1 |
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Registered User
Join Date: Jul 2009
Location: Rio Rancho New Mexico
Posts: 15
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What axle do i have?
I have a 65 1/2 ton gmc and i would like to know how to identify what axle i have and if i need to chance it to a 12 bolt.(im putting a 454 in it) It has leaf springs and its a 6 lug
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 1965 gmc 
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11-22-2009, 11:36 PM
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#2 |
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Member of the longbed union.
Join Date: Feb 2009
Location: Killeen, Tx
Posts: 2,158
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Re: What axle do i have?
It is a 12 bolt 30 spline, to figure the gears you can take the cover off and count the teeth on the gears.
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Paul 88 GMC Crew Cab dually, 454/T400 64 LWB 400 HP 350/350T Bagged, under construction! Sold most of it! 92 S10 Iron Duke 5 speed, 5/7 drop for now. soon to be bagged. Sold http://67-72chevytrucks.com/vboard/s...59#post4637759 |
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11-23-2009, 12:11 AM
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#3 |
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Account Suspended
Join Date: Jul 2007
Location: Plumas Lake, Ca.
Posts: 1,009
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Re: What axle do i have?
GMC also installed Dana rearends in their 1/2 tons.
Could be either. |
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11-23-2009, 12:20 AM
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#4 |
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Registered User
Join Date: Jul 2009
Location: Rio Rancho New Mexico
Posts: 15
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Re: What axle do i have?
its not a 12 bolt i know that. It only has 10 bolts so im thinking its a dana does any one no how to find out if its a dana 44 or 60 or gm 10 bolt
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1965 gmc
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11-23-2009, 12:49 AM
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#5 |
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Registered User
Join Date: May 2009
Location: Loganville, Ga.
Posts: 1,408
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Re: What axle do i have?
Maybe this will help..........http://www.coloradok5.com/axleguide.shtml
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11-23-2009, 01:50 AM
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#6 |
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60-66 Nut
  Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,252
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Re: What axle do i have?
The 1/2 ton GMC's with the leaf springs typically had Dana 44's. Probably not the best differential for your application. Probably the easiest and most economical swap would be a 12 bolt. They will take a fair amount of abuse in stock form and there are lots of aftermarket parts available for them. If you want to stay with 6 lugs, look for one out of a pre 1980 K10 or K5 Blazer.
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