Late Model Rearend in 67-72 Trucks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wHATANERD · 01-27-2009, 10:29 AM

Has anyone swapped a rearend out of a 99 and up GMC/Chevy pickup into on of our trucks? I know perches for the coil spring will have to be added, but is the 6 lug wheel pattern the same? And are the lengths the same? Any help in this will be greatly appreciated.

wHATANERD · 01-27-2009, 03:09 PM

Anyone?

Senator350 · 01-27-2009, 04:16 PM

had a 80's one ton rear in my '70. but was an 8 lug.

From my memory... might not be accurate:

the WMS-WMS of chevy SRW rears is between 62" and 69"

IIRC the front axles of our trucks are around 67", so a newer rear will hurt your tires due to a ruined track width.
BUT... you can space your tires however you want with different backspacings and wheel spacers to regain your track width.

getting wider as they get older.
62"ish in the late 50's
64"ish into the 70's
67"ish into the early 90's
69"ish lately

wHATANERD · 01-28-2009, 09:27 AM

Thanks For the Reply Senator350

01-27-2009, 10:29 AM	#1
wHATANERD Registered User Join Date: Mar 2003 Location: Uvalde, Tx Posts: 407	Late Model Rearend in 67-72 Trucks Has anyone swapped a rearend out of a 99 and up GMC/Chevy pickup into on of our trucks? I know perches for the coil spring will have to be added, but is the 6 lug wheel pattern the same? And are the lengths the same? Any help in this will be greatly appreciated. __________________ 1969 C/10 Longbed undergoing rebuild. Old Chevy's Never Die, They Just Rust Around The Edges

01-27-2009, 03:09 PM	#2
wHATANERD Registered User Join Date: Mar 2003 Location: Uvalde, Tx Posts: 407	Re: Late Model Rearend in 67-72 Trucks Anyone? __________________ 1969 C/10 Longbed undergoing rebuild. Old Chevy's Never Die, They Just Rust Around The Edges

01-27-2009, 04:16 PM	#3
Senator350 Registered User Join Date: Feb 2004 Location: Albany, NY Posts: 522	Re: Late Model Rearend in 67-72 Trucks had a 80's one ton rear in my '70. but was an 8 lug. From my memory... might not be accurate: the WMS-WMS of chevy SRW rears is between 62" and 69" IIRC the front axles of our trucks are around 67", so a newer rear will hurt your tires due to a ruined track width. BUT... you can space your tires however you want with different backspacings and wheel spacers to regain your track width. getting wider as they get older. 62"ish in the late 50's 64"ish into the 70's 67"ish into the early 90's 69"ish lately __________________ RN U OVR Last edited by Senator350; 01-27-2009 at 04:19 PM.

01-28-2009, 09:27 AM	#4
wHATANERD Registered User Join Date: Mar 2003 Location: Uvalde, Tx Posts: 407	Re: Late Model Rearend in 67-72 Trucks Thanks For the Reply Senator350 __________________ 1969 C/10 Longbed undergoing rebuild. Old Chevy's Never Die, They Just Rust Around The Edges



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