Differences between '82 &'83 rear ends - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jack'd up · 12-15-2003, 11:16 PM

What is the differences between '82 and earlier 1/2 ton rear ends and '83 to '87 rear ends. I have a rear end under a '70 model that is out of a '73 to '87 truck (bought it that way not sure which year). I have a posi unit and gears out of a '69 model and I want to put it into the later model housing. My question is will it work?
Thanks, Dennis

**swervin ervin** · 12-16-2003, 12:48 AM

Just depends. Count the bolts on the rear end cover. This will tell you if it will work. If the rear you have now has 12 bolts, it should work.

I think they went to 10 bolts in mid 82.

jack'd up · 12-16-2003, 12:59 AM

There both 12 bolts. Thanks for all the help Swervin Ervin.

ElGracho · 12-16-2003, 03:16 AM

Most 78 and up half tons will have 10 bolt rear ends. They continued to use 12 bolts in some applications, but I've never seen anything that would say what their logic was. My 80 Indy Hauler has its original 10 bolt.

the baron · 12-16-2003, 02:54 PM

I have a 12 bolts POSI on my 1979 C10 , it was powered by a 350 Olds Diesel , with a TH400 ...

The Baron

*1FaastC10* · 12-16-2003, 07:23 PM

they stopped using the 12 bolt altogether in '81, but started using the 10 bolt in '78.

12-15-2003, 11:16 PM	#1
jack'd up Registered User Join Date: May 2003 Location: DFW Posts: 127	Differences between '82 &'83 rear ends What is the differences between '82 and earlier 1/2 ton rear ends and '83 to '87 rear ends. I have a rear end under a '70 model that is out of a '73 to '87 truck (bought it that way not sure which year). I have a posi unit and gears out of a '69 model and I want to put it into the later model housing. My question is will it work? Thanks, Dennis

12-16-2003, 12:48 AM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Just depends. Count the bolts on the rear end cover. This will tell you if it will work. If the rear you have now has 12 bolts, it should work. I think they went to 10 bolts in mid 82. __________________ Mike 1985 Chevy C-10

12-16-2003, 03:16 AM	#4
ElGracho Gentleman Jim Driver Join Date: Nov 2002 Location: Poulsbo, WA Posts: 1,553	Most 78 and up half tons will have 10 bolt rear ends. They continued to use 12 bolts in some applications, but I've never seen anything that would say what their logic was. My 80 Indy Hauler has its original 10 bolt. __________________ Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed

12-16-2003, 02:54 PM	#5
the baron Registered User Join Date: Mar 2003 Location: Liège , Belgium Posts: 263	I have a 12 bolts POSI on my 1979 C10 , it was powered by a 350 Olds Diesel , with a TH400 ... The Baron __________________ 1982 Suburban 2WD , 260ci Olds engine,TH400 , will get a 1979 front clip , might be ready in ... 2016 1985 Chevy Van ( 305/350 ) , "Kellogg" equipped , my actual D.D. 1960 Girl Friend , frame still good , body has some dents

12-16-2003, 12:59 AM	#3
jack'd up Registered User Join Date: May 2003 Location: DFW Posts: 127	There both 12 bolts. Thanks for all the help Swervin Ervin.

12-16-2003, 07:23 PM	#6
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	they stopped using the 12 bolt altogether in '81, but started using the 10 bolt in '78.



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