how much - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mario1128 · 08-02-2010, 07:43 PM

how much hp will a stock 12 bolt rear end handle with stock axels .i have an auto tranny and 2800 stall . I picked up a spare rearend and am going to rebuild it so what ever it needs to handle 400- 500 hp ill do.

cableguy0 · 08-02-2010, 07:59 PM

The power isnt the issue. Its the traction. If you plan to run slicks at the track and make it hook. I would reccomend a good posi unit (eaton) and a set of upgraded axles. Other than that the rear itself is plenty strong.

mario1128 · 08-02-2010, 09:25 PM

thanks i knew the are a strong rear and it will have a posi and a new 4 link setup hopefully by spring

GMC70c20 · 08-21-2010, 09:08 PM

which 12 bolt are you talking about? The ones they put in cars or trucks. The ones they put in trucks are pretty week even with axles and a new carrier. Now the 8.875" 12 bolt (the one they put in cars) with a good set of axles and a good carrier then ya it should handle 400-500hp hooked. Like cableguy0 said you could put a tired 10 bolt under it and hook 1000hp to it but if it never hooks itle never break. Another thing to remember is the more weight you are moving the more stress it puts on drivline components so maybe instead of spening $600 on a carrier tryd to shed 300-400 lbs plus then it will hook better and drive better. Or do get a new carrier and still try to shed some weight.

cableguy0 · 08-21-2010, 09:35 PM

I disagree on the truck rear being that weak. It will handle 500hp with decent parts inside. I would reccomend a good posi unit and new axles with c clip eliminators. The car 12 bolt is stronger than the truck 12 bolt but its not near as extreme as its made out to be.

08-02-2010, 07:43 PM	#1
mario1128 Registered User Join Date: Jan 2009 Location: cheshire ct Posts: 55	how much how much hp will a stock 12 bolt rear end handle with stock axels .i have an auto tranny and 2800 stall . I picked up a spare rearend and am going to rebuild it so what ever it needs to handle 400- 500 hp ill do. __________________ 72 chevy former 1ton converted to 1/2 ton roller 350 engine , turbo 350 and a 12 bolt on leafsprings with a flip and drop springs

08-02-2010, 07:59 PM	#2
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: how much The power isnt the issue. Its the traction. If you plan to run slicks at the track and make it hook. I would reccomend a good posi unit (eaton) and a set of upgraded axles. Other than that the rear itself is plenty strong. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.

08-02-2010, 09:25 PM	#3
mario1128 Registered User Join Date: Jan 2009 Location: cheshire ct Posts: 55	Re: how much thanks i knew the are a strong rear and it will have a posi and a new 4 link setup hopefully by spring __________________ 72 chevy former 1ton converted to 1/2 ton roller 350 engine , turbo 350 and a 12 bolt on leafsprings with a flip and drop springs

08-21-2010, 09:08 PM	#4
GMC70c20 Registered User Join Date: Feb 2003 Location: Iowa Posts: 974	Re: how much which 12 bolt are you talking about? The ones they put in cars or trucks. The ones they put in trucks are pretty week even with axles and a new carrier. Now the 8.875" 12 bolt (the one they put in cars) with a good set of axles and a good carrier then ya it should handle 400-500hp hooked. Like cableguy0 said you could put a tired 10 bolt under it and hook 1000hp to it but if it never hooks itle never break. Another thing to remember is the more weight you are moving the more stress it puts on drivline components so maybe instead of spening $600 on a carrier tryd to shed 300-400 lbs plus then it will hook better and drive better. Or do get a new carrier and still try to shed some weight. __________________ 1970 c20 converted to c10 sleeper 1979 c20 the wood hauler 1991 honda civic daily driver spray and pray baby

08-21-2010, 09:35 PM	#5
cableguy0 Senior Member Join Date: Apr 2000 Location: Delta,Pa Posts: 14,948	Re: how much I disagree on the truck rear being that weak. It will handle 500hp with decent parts inside. I would reccomend a good posi unit and new axles with c clip eliminators. The car 12 bolt is stronger than the truck 12 bolt but its not near as extreme as its made out to be. __________________ Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.



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