Rear swap - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Longhorn Man · 12-03-2003, 02:16 AM

Anyone know off the top of there head if the rear in a 93 GMC one ton pick up would work in a longhorn?
Any idea what rear that would be? Pretty sure it isn't a dana. (I ahven't been under the pig in over a year)
I don't know the width of the longhorn rear off the top of my head, and a shock absorber relocating won't be too bad...
One of the trucks at the shop just took an expensive crap and we figure it isn't worth fixing up, so I might be able to get the truck for next to nothing...maybe even get it for absolutly nothing.

Anyone able to help on this?

Longhorn Man · 12-03-2003, 02:37 AM

Just for sh!ts and giggles...here's the donor truck.

lukecp · 12-03-2003, 02:47 AM

The rear is proably a 14-bolt GM rear....pretty tough rear, especially the full-floating models. No clue on if it would work though....time to break out the tape measure and start measuring!

mikep684x4 · 12-03-2003, 02:51 AM

It will work but you need to move the spring perches out 1 1/2 inches on each side because the 87 and newer have narrower frames

Longhorn Man · 12-03-2003, 08:05 AM

How about expensive U-joints?

Huck · 12-03-2003, 10:14 AM

Andy, 88' and up use a wider frame which will require different spring mount locations, shock mount locations. I don't think the universal joint should be a show stopper as you can modify any driveshaft pretty cheep. You will probably need to know the gearing as that could be important.

busterwivell · 12-03-2003, 03:57 PM

Andy, do we think alike or what? I was just given one of those rear ends. I don't know the gear ratio yet or anything, but some rough measuring in my case looks like the leaf springs are just about right on. Don't know how fast I can get to it, but I'll keep you posted when I get to it. If you get on the project right away, let me know!

Longhorn Man · 12-04-2003, 01:15 AM

Well thanks for the info everyone..looks liek this deal just fell through.

The boss man got his hands on a tranny for teh truck fo free, and this truck is a seriouse money maker. (has a start-all jump start system mounted in the back. Jump start the deadest of heavy equipment in a matter of moments)
Oh well...you win some and you lose some.

dwaite72lnghrn · 12-04-2003, 09:49 PM

Andy don't give up yet! You know how free transmissions are? It might be in the same parking spot in short order.

Longhorn Man · 12-05-2003, 01:00 AM

LOL, actually, I know for a fact that this tranny is good, and only has about 45K on it.
We have a contract with Frito Lay to rebuild some of there trucks. The free tranny is out of one of there trucks and the mileage is stamped onto the tranny from when it was last chainged.
Frito Lay only wants a core...as long as it is the same make/model and complete...they even told us that if we want to keep the good stuff and provide complet unservicable units...to go for it.

12-03-2003, 02:16 AM	#1
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Rear swap Anyone know off the top of there head if the rear in a 93 GMC one ton pick up would work in a longhorn? Any idea what rear that would be? Pretty sure it isn't a dana. (I ahven't been under the pig in over a year) I don't know the width of the longhorn rear off the top of my head, and a shock absorber relocating won't be too bad... One of the trucks at the shop just took an expensive crap and we figure it isn't worth fixing up, so I might be able to get the truck for next to nothing...maybe even get it for absolutly nothing. Anyone able to help on this?

12-03-2003, 02:37 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Just for sh!ts and giggles...here's the donor truck. Attached Images

12-03-2003, 02:47 AM	#3
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	The rear is proably a 14-bolt GM rear....pretty tough rear, especially the full-floating models. No clue on if it would work though....time to break out the tape measure and start measuring! __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

12-03-2003, 02:51 AM	#4
mikep684x4 Seeker of the big and bad Join Date: Nov 2000 Location: wheatland,Calif,yuba Posts: 105	It will work but you need to move the spring perches out 1 1/2 inches on each side because the 87 and newer have narrower frames __________________ 71 3/4 ton 4x4,665hp 454. 67 GMC 1 ton towtruck 68 chevy LB 4x4 64 chevy LB custom 57 Bel-air 2d station wagon

12-03-2003, 03:57 PM	#7
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	Andy, do we think alike or what? I was just given one of those rear ends. I don't know the gear ratio yet or anything, but some rough measuring in my case looks like the leaf springs are just about right on. Don't know how fast I can get to it, but I'll keep you posted when I get to it. If you get on the project right away, let me know! __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

12-03-2003, 08:05 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	How about expensive U-joints?

12-03-2003, 10:14 AM	#6
Huck Senior Member Join Date: Jun 2001 Location: Shelbyville, KY Posts: 3,261	Andy, 88' and up use a wider frame which will require different spring mount locations, shock mount locations. I don't think the universal joint should be a show stopper as you can modify any driveshaft pretty cheep. You will probably need to know the gearing as that could be important.

12-04-2003, 01:15 AM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Well thanks for the info everyone..looks liek this deal just fell through. The boss man got his hands on a tranny for teh truck fo free, and this truck is a seriouse money maker. (has a start-all jump start system mounted in the back. Jump start the deadest of heavy equipment in a matter of moments) Oh well...you win some and you lose some.

12-04-2003, 09:49 PM	#9
dwaite72lnghrn Registered User Join Date: Jun 2002 Location: central pa Posts: 1,525	Andy don't give up yet! You know how free transmissions are? It might be in the same parking spot in short order. __________________ 72 longhorn c30 502BB/th400/fact air/4.11rear/ custom camper 72 bug(the better half's) under reconstruction 2009 HHR aqua blue 71 GMC k20 350/sm465 2009 Chevy hd3500 6.6 Victory Red crew cab dually Dave & Jeanne

12-05-2003, 01:00 AM	#10
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	LOL, actually, I know for a fact that this tranny is good, and only has about 45K on it. We have a contract with Frito Lay to rebuild some of there trucks. The free tranny is out of one of there trucks and the mileage is stamped onto the tranny from when it was last chainged. Frito Lay only wants a core...as long as it is the same make/model and complete...they even told us that if we want to keep the good stuff and provide complet unservicable units...to go for it.



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