1979 3/4 ton axle swap to a 1/2 ton 71' - The 1947 - Present Chevrolet & GMC Truck Message Board Network

eedgell · 05-06-2007, 03:37 PM

Ok guys, here is my question: I have a 1979 3/4 ton donor for axles, they are dana 44 front and GM 14 bolt rear w/4:10 gears open diff. I know I will have to change the rear spring perches to fit, but what about the drive lines? The 1979 has a carrier bearing in the rear with a jack shaft, will I need to incorperate this in the swap or can I use a one piece rear drive line? What else may I run into? Both trucks have np 205's.

1tonblaze · 05-06-2007, 06:18 PM

i am doing the same swap in my 70 k/5 but with a 1975 dana 44 and a 14 blot so far i havent had to do anything to crazy to mine. the front axle just bolted in the rear i am still working on . but so far everything has been a bolt on swap

mudmizer · 05-06-2007, 11:57 PM

I did the exact same thing on my 68. I used a doner 74, 44-14 bolt. Changed the pearches and the shock mounts on the 14 bolt and made new locations for the E-brake mounts, thats all. Mine is short bed, so no drive shaft carrier bearing to ponder.

05-06-2007, 03:37 PM	#1
eedgell It's the air up here Join Date: Mar 2007 Location: Western Colorado Posts: 710	1979 3/4 ton axle swap to a 1/2 ton 71' Ok guys, here is my question: I have a 1979 3/4 ton donor for axles, they are dana 44 front and GM 14 bolt rear w/4:10 gears open diff. I know I will have to change the rear spring perches to fit, but what about the drive lines? The 1979 has a carrier bearing in the rear with a jack shaft, will I need to incorperate this in the swap or can I use a one piece rear drive line? What else may I run into? Both trucks have np 205's. __________________ 1971 cheyenne k10 4 speed np 205 454 BB factory a/c Never drink down stream of the herd! Eric Last edited by eedgell; 05-06-2007 at 03:39 PM.

05-06-2007, 06:18 PM	#2
1tonblaze Registered User Join Date: Feb 2007 Location: Carroll County Maryland , Posts: 828	Re: 1979 3/4 ton axle swap to a 1/2 ton 71' i am doing the same swap in my 70 k/5 but with a 1975 dana 44 and a 14 blot so far i havent had to do anything to crazy to mine. the front axle just bolted in the rear i am still working on . but so far everything has been a bolt on swap __________________ 1970 k/5 blazer--> money pit - 14bolt dana 44 350 sm465/205 36 14.50 16 tires 1972 nova plane jane 6 clyinder might sell might keep dont know 2004 chevy s-10 crewcab zr5 sold 1985 c20 chevy long bed , beater , on its way to a better place in pa from what the dmv told me 2010 kia forte koup 2.4 sx -over the river and threw the woods to the total lot it went . 1999 k1500 suburban 350 vortec 4l60e leather land yacht .

05-06-2007, 11:57 PM	#3
mudmizer Registered User Join Date: Jan 2007 Location: Bellingham, washington Posts: 260	Re: 1979 3/4 ton axle swap to a 1/2 ton 71' I did the exact same thing on my 68. I used a doner 74, 44-14 bolt. Changed the pearches and the shock mounts on the 14 bolt and made new locations for the E-brake mounts, thats all. Mine is short bed, so no drive shaft carrier bearing to ponder. __________________ 68 4x4, 454, 4 speed, disk brakes both ends, Sold my 69 SS396 Elcamino when young & stupid

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