8" Lift & 3/4 Ton Axel swap - Help Needed! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ryan Flowers · 07-31-2003, 01:47 PM

Fellow gear heads,

I need help with the following:

I am going to put an 8" lift on the 90 Suburban. While I am at it I want to go ahead and drop a pair of GMC 3/4 Ton axles under it. Can anyone tell me if this is a swap and bolt project? I know I will have to have new drive shafts made but are there any hidden things I should know about, like brake cables and hoses not matching up or spring perches needing to be relocated. I will also be doing a cross over steering (thanks Pont for that recomendation). As soon as she is complete I will be posting pics. Any and all info would be GREATLY appreciated.

Thanks,

**JIMs70GMC** · 08-01-2003, 05:06 AM

For the most part it should be bolt-on. The big stuff will. Shouldn't have to fab anything since the Suburban did come as a 3/4 ton. What rear axle will you be using? Probably a 14 bolt. The spring pads should be the same it's the 1 tons that are different width. Definetly need longer brake lines. Is it going to be an all spring lift?

Ryan Flowers · 08-01-2003, 10:23 AM

Jim,

Yes it will be an all spring lift. Thanks for the info.

*1FaastC10* · 08-01-2003, 02:57 PM

what year are your axles? i believe 88+ had a driver's side pig, and the older ones were on teh passenger side.

07-31-2003, 01:47 PM	#1
Ryan Flowers No Brakes Club Join Date: Jan 2003 Location: Carthage, N.C. Posts: 263	8" Lift & 3/4 Ton Axel swap - Help Needed! Fellow gear heads, I need help with the following: I am going to put an 8" lift on the 90 Suburban. While I am at it I want to go ahead and drop a pair of GMC 3/4 Ton axles under it. Can anyone tell me if this is a swap and bolt project? I know I will have to have new drive shafts made but are there any hidden things I should know about, like brake cables and hoses not matching up or spring perches needing to be relocated. I will also be doing a cross over steering (thanks Pont for that recomendation). As soon as she is complete I will be posting pics. Any and all info would be GREATLY appreciated. Thanks, __________________ Ryan Flowers 85 GMC Suburban 4x4 379 90 GMC Suburban 4x4 383 01 Chevy Suburban 2x4 350 Click here to email me Click here to visit my web site

08-01-2003, 05:06 AM	#2
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	For the most part it should be bolt-on. The big stuff will. Shouldn't have to fab anything since the Suburban did come as a 3/4 ton. What rear axle will you be using? Probably a 14 bolt. The spring pads should be the same it's the 1 tons that are different width. Definetly need longer brake lines. Is it going to be an all spring lift? __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

08-01-2003, 10:23 AM	#3
Ryan Flowers No Brakes Club Join Date: Jan 2003 Location: Carthage, N.C. Posts: 263	Jim, Yes it will be an all spring lift. Thanks for the info. __________________ Ryan Flowers 85 GMC Suburban 4x4 379 90 GMC Suburban 4x4 383 01 Chevy Suburban 2x4 350 Click here to email me Click here to visit my web site

08-01-2003, 02:57 PM	#4
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	what year are your axles? i believe 88+ had a driver's side pig, and the older ones were on teh passenger side.



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