Need rear differential advice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Goats86 · 12-12-2010, 10:10 PM

I have searched this board for the last 3 days looking for an answer. No luck. So I thought I would ask for some feedback. I want to swap a different rear end under my 1986 c10. I would like 3:42 gears(approximately), limited slip, and disc brakes. Here's the question. Is there a particular unit that would swap almost straight into my frame? Same width, I could move any spring mounts etc. ie Camaro, Impala, 2000 c1500, etc. 10 bolt or 12 bolt????

allengator · 12-13-2010, 10:44 AM

I dont know of any...
But you should be able to research your measurments against the measurements of the stock rears you mention by doing some google searches.

Big Port Jimmy 6 · 12-13-2010, 12:24 PM

Whats your budget?

Goats86 · 12-13-2010, 12:55 PM

I am cheap. However, for the perfect fix/fit, I could probably do $700 for a budget.

Big Port Jimmy 6 · 12-13-2010, 08:29 PM

With that kind of budget, I would think that the 88-98 C 10, rear some new perches and some "race car" brake parts would get you there. This however does require moderate fabrication and welding. Jay

454HO · 12-13-2010, 09:07 PM

Just last week I picked up a non-posi 3.42 rear end from a recycle yard for $100. It was from a '88 Suburban that had just come in to be stripped. A Powertrax locker is about $330 from Summit and it installs easily at home with no special tools required. And for disc brakes, there are several complete conversion kits available in the $350-$400 range, or you can just get a set of mounting brackets for the Eldorado calipers and source all the rest of the parts yourself.

GMC Guy · 12-13-2010, 09:21 PM

Quote:

Originally Posted by 454HO

Just last week I picked up a non-posi 3.42 rear end from a recycle yard for $100. It was from a '88 Suburban that had just come in to be stripped. A Powertrax locker is about $330 from Summit and it installs easily at home with no special tools required. And for disc brakes, there are several complete conversion kits available in the $350-$400 range, or you can just get a set of mounting brackets for the Eldorado calipers and source all the rest of the parts yourself.

anyone have any reviews on the Powertrax?

brown78 · 12-18-2010, 11:14 PM

Not to hyjack the thread....but, I was looking to do this same swap, minus the disc brakes. Is the 88-93 rear end the same width as the 73-87? Does anybody Know the exact wms to wms for these two rear ends. I'm sure this info would help out the the org. poster as well. Thanks.

Goats86 · 12-18-2010, 11:21 PM

My stock differential is 63.75" wms to wms. I found a 1990 Camaro unit with disc brakes. 3:42 gears, and positrac for $500. It is 64" wms to wms. Think I'm gonna jump on it.

Tx Firefighter · 12-18-2010, 11:28 PM

That Camaro has a different wheel bolt pattern than your truck does.
Posted via Mobile Device

Goats86 · 12-19-2010, 11:30 AM

Yes. I have access to a mill. I will redrill the fronts. So many more choices for wheels when you go to the car pattern.

*nbpro* · 12-19-2010, 11:34 AM

I hear,Powertrax are pretty good.

http://www.4x4wire.com/reviews/no-slip/

YouTube - Powertrax Traction Demonstration

l

12-12-2010, 10:10 PM	#1
Goats86 Registered User Join Date: Dec 2010 Location: Waxahachie, Texas Posts: 144	Need rear differential advice I have searched this board for the last 3 days looking for an answer. No luck. So I thought I would ask for some feedback. I want to swap a different rear end under my 1986 c10. I would like 3:42 gears(approximately), limited slip, and disc brakes. Here's the question. Is there a particular unit that would swap almost straight into my frame? Same width, I could move any spring mounts etc. ie Camaro, Impala, 2000 c1500, etc. 10 bolt or 12 bolt????

12-13-2010, 10:44 AM	#2
allengator Registered User Join Date: Dec 2010 Location: Burleson, Texas Posts: 596	Re: Need rear differential advice I dont know of any... But you should be able to research your measurments against the measurements of the stock rears you mention by doing some google searches. __________________ Allengator Outta the Blue (my band - available for hire in the DFW area!) 1980 Chevy SWB Pickup (build thread) 1951 Chevy Sedan Delivery 2004 Chevy Tahoe Z71 2011 Harley Davidson Street Glide 2018 Silverado Z71 Crew Cab

12-13-2010, 12:24 PM	#3
Big Port Jimmy 6 Addicted to Rust Join Date: Dec 2009 Location: Abbeville SC Posts: 1,030	Re: Need rear differential advice Whats your budget? __________________ Current trucks: (48 GMC100 320 inliner) Gone (48 Suburban in pieces) Sold 87 GMC CCSB 5.3 4l60E Daily Driver ECTA National record holder XO/PP We never really grow up, we just learn how to act in public.

12-13-2010, 12:55 PM	#4
Goats86 Registered User Join Date: Dec 2010 Location: Waxahachie, Texas Posts: 144	Re: Need rear differential advice I am cheap. However, for the perfect fix/fit, I could probably do $700 for a budget.

12-13-2010, 08:29 PM	#5
Big Port Jimmy 6 Addicted to Rust Join Date: Dec 2009 Location: Abbeville SC Posts: 1,030	Re: Need rear differential advice With that kind of budget, I would think that the 88-98 C 10, rear some new perches and some "race car" brake parts would get you there. This however does require moderate fabrication and welding. Jay __________________ Current trucks: (48 GMC100 320 inliner) Gone (48 Suburban in pieces) Sold 87 GMC CCSB 5.3 4l60E Daily Driver ECTA National record holder XO/PP We never really grow up, we just learn how to act in public. Last edited by Big Port Jimmy 6; 12-13-2010 at 08:30 PM.

12-13-2010, 09:07 PM	#6
454HO Registered User Join Date: Apr 2005 Location: Austin, TX Posts: 1,223	Re: Need rear differential advice Just last week I picked up a non-posi 3.42 rear end from a recycle yard for $100. It was from a '88 Suburban that had just come in to be stripped. A Powertrax locker is about $330 from Summit and it installs easily at home with no special tools required. And for disc brakes, there are several complete conversion kits available in the $350-$400 range, or you can just get a set of mounting brackets for the Eldorado calipers and source all the rest of the parts yourself. __________________ - Greg

12-18-2010, 11:14 PM	#8
brown78 Registered User Join Date: Oct 2010 Location: CAMANO ISLAND WA Posts: 31	Re: Need rear differential advice Not to hyjack the thread....but, I was looking to do this same swap, minus the disc brakes. Is the 88-93 rear end the same width as the 73-87? Does anybody Know the exact wms to wms for these two rear ends. I'm sure this info would help out the the org. poster as well. Thanks.

12-18-2010, 11:21 PM	#9
Goats86 Registered User Join Date: Dec 2010 Location: Waxahachie, Texas Posts: 144	Re: Need rear differential advice My stock differential is 63.75" wms to wms. I found a 1990 Camaro unit with disc brakes. 3:42 gears, and positrac for $500. It is 64" wms to wms. Think I'm gonna jump on it.

12-18-2010, 11:28 PM	#10
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: Need rear differential advice That Camaro has a different wheel bolt pattern than your truck does. Posted via Mobile Device __________________ I'm on the Instagram- @Gearhead_Kevin

12-19-2010, 11:30 AM	#11
Goats86 Registered User Join Date: Dec 2010 Location: Waxahachie, Texas Posts: 144	Re: Need rear differential advice Yes. I have access to a mill. I will redrill the fronts. So many more choices for wheels when you go to the car pattern.



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