Rear-end conversion question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

yellowGT · 12-27-2008, 05:44 PM

my recent 68 that i purchased has a 12 bolt rearend just like my 69 that i have. The 69 has been converted to 5 lug so i imagine someone just changed out the axles in it. Is that possible? Could i change the axles from a 10 bolt truck to a 12 bolt. Because the 10 bolt rearend comes from a 81-87 chevy and the u-bolt plates are on the wrong side and they dont have the hole for the bar therefore I just cant change out the rearends. I would think that if they are spline the same it should be a cake walk. Does anyone know the spline count for both before i start popping covers?

Cyclone · 12-27-2008, 05:49 PM

You could use that 5 lug rear end by utilizing one of these kits. I hear the axle swap wont work, there different lengths.

66skylarkpost · 12-27-2008, 07:17 PM

no way . the ten bolts you are refeering to are have 28 splined axles and the 12 bolt have 30

yellowGT · 12-28-2008, 03:38 AM

Quote:

Originally Posted by 66skylarkpost

no way . the ten bolts you are refeering to are have 28 splined axles and the 12 bolt have 30

so the only way to make the conversion without changing rearends would be to find a rearend from a 72 truck with 5 lug. If thats the case, changing the whole rearend from a 72 would be just as easy.

Cyclone · 12-28-2008, 12:12 PM

You could do an axle/drum swap.

yellowGT · 12-28-2008, 07:39 PM

Quote:

Originally Posted by Cyclone

You could do an axle/drum swap.

yeah thats one thought i ran into last night....pricey though

thanks guys

12-27-2008, 05:44 PM	#1
yellowGT Registered User Join Date: Jan 2006 Location: Garland, TX Posts: 970	Rear-end conversion question my recent 68 that i purchased has a 12 bolt rearend just like my 69 that i have. The 69 has been converted to 5 lug so i imagine someone just changed out the axles in it. Is that possible? Could i change the axles from a 10 bolt truck to a 12 bolt. Because the 10 bolt rearend comes from a 81-87 chevy and the u-bolt plates are on the wrong side and they dont have the hole for the bar therefore I just cant change out the rearends. I would think that if they are spline the same it should be a cake walk. Does anyone know the spline count for both before i start popping covers? __________________ '84 swb chevy '69 swb chevy '68 swb chevy '95 Impala ss-sold '89 chevy crew cab dually 3+3

12-27-2008, 05:49 PM	#2
Cyclone Registered User Join Date: Oct 2004 Location: Sonoma, CA Posts: 318	Re: Rear-end conversion question You could use that 5 lug rear end by utilizing one of these kits. I hear the axle swap wont work, there different lengths.

12-27-2008, 07:17 PM	#3
66skylarkpost Registered User Join Date: Mar 2006 Location: kearney,nebraska Posts: 443	Re: Rear-end conversion question no way . the ten bolts you are refeering to are have 28 splined axles and the 12 bolt have 30 __________________ '70 k-10 longbox- mid 70's drivetrain 350/350 487x heads 10.1:1 flowmasters ,35's 3.73's auburn posi ,rear shackle flip. '72 short stepside U.S. forestry truck, '73 455 buick,400 turbo,dropped 2"-4 1/4" ,3.07 posi,:'89 silverado 1500 ,OK truck ,5.7 holley tbi ,trick 700r4 3.07 auburn posi ,and my '66 skylark ,'73 centurion and my '84 monte carlo imca stock car

12-28-2008, 12:12 PM	#5
Cyclone Registered User Join Date: Oct 2004 Location: Sonoma, CA Posts: 318	Re: Rear-end conversion question You could do an axle/drum swap.



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