rear end questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

i heart square bodys · 10-08-2013, 09:57 AM

okay so i want to put a 12 bolt in my truck. i realize that it is easier to find them with 6 lug pattern but id like to keep the 5 lug. i have a pile of 10 bolt rear ends with 5x5 lug pattern and was wondering if the axles will interchange. also wondering if the brakes will do the same ? now my other thought was to maybe get a 12 bolt with disk brakes but once again the problem arises that i want to keep it 5x5, any way i can do this without having to drill out the rotors (any other oem rotor from other aplication) if i can get the prefered axles in it. thanks !

D13 · 10-08-2013, 11:46 AM

Why a 12 bolt? The truck 12 bolts are not significantly stronger than 10 bolts, actually have smaller pinions.
Axle shafts do not interchange 10 to 12 bolt.
2wd 1/2 tons 73-82 were 5 stud 12 bolts, there are tons of these in the j-yards. 6 bolts in 4wd for 10 or 12 bolts. Need to change U joints and may need metric to SAE brake pipe adaptor to swap complete axles.
Disc brakes are pricey but there are parts available (search this forum and the Suspension forum), costs about the same 10 or 12 bolt. Many kits available, or can piece together with a little thought.

i heart square bodys · 10-08-2013, 01:27 PM

Sooo id just be wasting my time swappinh from a 10 to a 12? What about going to a 14 bolt ? How easy are they to convert to 5 lug and put my 1/2 ton drums on?

i heart square bodys · 10-08-2013, 01:29 PM

If i swap to a 12 bolt ill get one with the 5 lugs already in it , will the brakes still interchange?

ont_guy_38 · 10-08-2013, 02:09 PM

If a bit of width and some fab work doesn't bother you, get a 14 bolt out of a 454 SS truck. They are 5 lug. Unless you have to upgrade gears and stuff anyways, the 12 bolt isn't worth the extra you will spend on it.

i heart square bodys · 10-08-2013, 02:25 PM

Well thats the thing , i am going to do a set of gears and posi so i figured id be better off doing the 12 bolt instead of putting my money into the 10

willett · 10-08-2013, 02:54 PM

I thought that regular 14 bolts (ff) were 8 lug and 14 bolt sf's were 6 lug. Didn't know there was such thing as a 5er

i heart square bodys · 10-08-2013, 03:29 PM

The 454ss truck is a 14 bolt 5 lug but thats it , i figured i could get hubs for that application and swap em out

Rich84 · 10-08-2013, 04:13 PM

I would just spend the money on the 10 bolt..Plenty of people have them with huge motors.

i heart square bodys · 10-08-2013, 04:37 PM

fair nuff !

Keith Seymore · 10-09-2013, 03:03 PM

Quote:

Originally Posted by Rich84

I would just spend the money on the 10 bolt..Plenty of people have them with huge motors.

Agree. I've still got the original 10 bolt in my Chevelle.

555 cu in, 950 HP, 9.80 ETs at 3900 lbs. Been racing this car 35 years, probably 20 of those going 11.80's or quicker.

K

ont_guy_38 · 10-09-2013, 02:23 PM

Our truck 10 bolts are the same as a car 10 bolt, so parts are interchangeable from any early car 8.5 read end up therefore way easier to get and more reasonably priced. I have a posi out of a camaro in my truck. Works awesome, way better than the Gov lock that trucks have.

Rich84 · 10-09-2013, 03:09 PM

I guess mine is safe!!!..lol

lucekfd142 · 10-10-2013, 09:30 PM

does anybody know if a impala ss rearend will work in a 84 chevrolet truck?

10-08-2013, 09:57 AM	#1
i heart square bodys Registered User Join Date: Dec 2011 Location: Blyth, Ontario, Canada Posts: 187	rear end questions okay so i want to put a 12 bolt in my truck. i realize that it is easier to find them with 6 lug pattern but id like to keep the 5 lug. i have a pile of 10 bolt rear ends with 5x5 lug pattern and was wondering if the axles will interchange. also wondering if the brakes will do the same ? now my other thought was to maybe get a 12 bolt with disk brakes but once again the problem arises that i want to keep it 5x5, any way i can do this without having to drill out the rotors (any other oem rotor from other aplication) if i can get the prefered axles in it. thanks ! __________________ 1986 LWB c10 w/327 & vortec heads

10-08-2013, 11:46 AM	#2
D13 Registered User Join Date: Feb 2007 Location: Memphis MI Posts: 1,851	Re: rear end questions Why a 12 bolt? The truck 12 bolts are not significantly stronger than 10 bolts, actually have smaller pinions. Axle shafts do not interchange 10 to 12 bolt. 2wd 1/2 tons 73-82 were 5 stud 12 bolts, there are tons of these in the j-yards. 6 bolts in 4wd for 10 or 12 bolts. Need to change U joints and may need metric to SAE brake pipe adaptor to swap complete axles. Disc brakes are pricey but there are parts available (search this forum and the Suspension forum), costs about the same 10 or 12 bolt. Many kits available, or can piece together with a little thought. __________________ 1987 2 ton 1982 250/TH350 beater in progress Dad's 1981 3/4 L6 3 on tree posi and no options, awaiting restoration or scrapping Plus a mess o' tractors

10-08-2013, 01:27 PM	#3
i heart square bodys Registered User Join Date: Dec 2011 Location: Blyth, Ontario, Canada Posts: 187	Re: rear end questions Sooo id just be wasting my time swappinh from a 10 to a 12? What about going to a 14 bolt ? How easy are they to convert to 5 lug and put my 1/2 ton drums on? __________________ 1986 LWB c10 w/327 & vortec heads

10-08-2013, 01:29 PM	#4
i heart square bodys Registered User Join Date: Dec 2011 Location: Blyth, Ontario, Canada Posts: 187	Re: rear end questions If i swap to a 12 bolt ill get one with the 5 lugs already in it , will the brakes still interchange? __________________ 1986 LWB c10 w/327 & vortec heads

10-08-2013, 02:09 PM	#5
ont_guy_38 Registered User Join Date: Jul 2007 Location: Ontario Canada Posts: 1,006	Re: rear end questions If a bit of width and some fab work doesn't bother you, get a 14 bolt out of a 454 SS truck. They are 5 lug. Unless you have to upgrade gears and stuff anyways, the 12 bolt isn't worth the extra you will spend on it. __________________ 1985 C10 2004 Avalanche

10-08-2013, 02:25 PM	#6
i heart square bodys Registered User Join Date: Dec 2011 Location: Blyth, Ontario, Canada Posts: 187	Re: rear end questions Well thats the thing , i am going to do a set of gears and posi so i figured id be better off doing the 12 bolt instead of putting my money into the 10 __________________ 1986 LWB c10 w/327 & vortec heads

10-08-2013, 02:54 PM	#7
willett Another Day, Another Dollar Join Date: Nov 2008 Location: North Vancouver, BC Posts: 1,316	Re: rear end questions I thought that regular 14 bolts (ff) were 8 lug and 14 bolt sf's were 6 lug. Didn't know there was such thing as a 5er __________________ -78 K20 Cheyenne 454 long box, 4" lift, 35" MT's, '84 cab, '80 box "its hip to be square"

10-08-2013, 03:29 PM	#8
i heart square bodys Registered User Join Date: Dec 2011 Location: Blyth, Ontario, Canada Posts: 187	Re: rear end questions The 454ss truck is a 14 bolt 5 lug but thats it , i figured i could get hubs for that application and swap em out __________________ 1986 LWB c10 w/327 & vortec heads

10-08-2013, 04:13 PM	#9
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,694	Re: rear end questions I would just spend the money on the 10 bolt..Plenty of people have them with huge motors.

10-08-2013, 04:37 PM	#10
i heart square bodys Registered User Join Date: Dec 2011 Location: Blyth, Ontario, Canada Posts: 187	Re: rear end questions fair nuff ! __________________ 1986 LWB c10 w/327 & vortec heads

10-09-2013, 02:23 PM	#12
ont_guy_38 Registered User Join Date: Jul 2007 Location: Ontario Canada Posts: 1,006	Re: rear end questions Our truck 10 bolts are the same as a car 10 bolt, so parts are interchangeable from any early car 8.5 read end up therefore way easier to get and more reasonably priced. I have a posi out of a camaro in my truck. Works awesome, way better than the Gov lock that trucks have. __________________ 1985 C10 2004 Avalanche

10-09-2013, 03:09 PM	#13
Rich84 Registered User Join Date: Mar 2012 Location: Woodbury, Ct. Posts: 1,694	Re: rear end questions I guess mine is safe!!!..lol

10-10-2013, 09:30 PM	#14
lucekfd142 Registered User Join Date: Dec 2009 Location: Belton,TX Posts: 8	Re: rear end questions does anybody know if a impala ss rearend will work in a 84 chevrolet truck?



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