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05-24-2013, 07:42 PM
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#1 |
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Registered User
Join Date: Dec 2008
Location: Wyoming
Posts: 811
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truck 12 bolt rear diff question
How strong are they? I've been spoiled for too long with the larger FF 10.5" 14bolts and have no idea how tough the truck 12 bolts are.
Any help is greatly appreciated 
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1983 Chevy C10 250/3spd (current project truck) 1976 Chevy C10 350/350 Heavy Half (future project truck) |
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05-24-2013, 08:09 PM
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#2 |
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Registered User
 
Join Date: Oct 2009
Location: SoCal
Posts: 815
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Re: truck 12 bolt rear diff question
They are strong enough that GM put them behind all the factory Big Blocks, like SS Chevelles, Camaros, and trucks. The weakest part is the C- clips. Get C- clip eliminators to help resolve that weakness.
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05-24-2013, 08:25 PM
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#3 | |
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Registered User
Join Date: Dec 2008
Location: Wyoming
Posts: 811
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Re: truck 12 bolt rear diff question
Quote:
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1983 Chevy C10 250/3spd (current project truck) 1976 Chevy C10 350/350 Heavy Half (future project truck) |
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05-24-2013, 08:27 PM
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#4 |
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Registered User
Join Date: Oct 2009
Location: SoCal
Posts: 815
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Re: truck 12 bolt rear diff question
They are a little different, but are all the same size. 8.75" The 10 bolts are 8.5" and 7.5"
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05-24-2013, 11:41 PM
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#5 |
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Registered User
Join Date: Feb 2013
Location: Upland, Calif
Posts: 698
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Re: truck 12 bolt rear diff question
Ring gear the same but I think the pinion is smaller diameter on the truck 12 bolt. They are not interchangeable on the internals.
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05-25-2013, 12:43 AM
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#6 |
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MOTORHEAD!
Join Date: May 2000
Location: Devon AB, Canada
Posts: 849
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Re: truck 12 bolt rear diff question
I heard the truck 10bolt pinion is actually stronger than the truck 12 bolt pinion. That being said, there are people in the 9's with truck 12 bolts...
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82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph |
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