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09-24-2010, 11:38 AM
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#1 |
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Registered User
Join Date: Jul 2001
Location: North Louisiana
Posts: 4,501
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Is a 4wd rearend the same as 2wd?
Are there any differences that may cause problems in a swap? Both are '72 model, both 8 lug 3/4 ton rearends, (Eaton, I believe) but one is out of a 4 wheel drive, and one is out of a 2 wheel drive. Both are leaf spring rearends.
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Wynne 70 CST short fleet Hugger orange & white, 350/350, ps, pb, air, tilt, tach/vac/speedwarning, original buckets, AM/FM, oak bed floor, shoulder belts, 3.5"/5.5" drop, 20" American Racing VN425s. Build thread 53 Chevy shortbed 69 Camaro Click here to subscribe Chevy GMC International Truck Club Louisiana Charter Member http://www.louisianaclassictruckclub.com Last edited by HuggerCST; 09-24-2010 at 11:46 AM. |
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09-24-2010, 01:22 PM
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#2 |
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Senior Member
 
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: Is a 4wd rearend the same as 2wd?
It shouldn't make any difference if they are both leaf spring rear ends.
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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09-24-2010, 03:49 PM
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#3 | |
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Registered User
Join Date: Jul 2001
Location: North Louisiana
Posts: 4,501
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Re: Is a 4wd rearend the same as 2wd?
Quote:
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Wynne 70 CST short fleet Hugger orange & white, 350/350, ps, pb, air, tilt, tach/vac/speedwarning, original buckets, AM/FM, oak bed floor, shoulder belts, 3.5"/5.5" drop, 20" American Racing VN425s. Build thread 53 Chevy shortbed 69 Camaro Click here to subscribe Chevy GMC International Truck Club Louisiana Charter Member http://www.louisianaclassictruckclub.com |
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09-24-2010, 05:27 PM
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#4 |
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Senior Member
Join Date: Jan 2002
Location: Williston, ND
Posts: 2,999
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Re: Is a 4wd rearend the same as 2wd?
Shock mounts may be different but the width should be the same. The driveshaft may be different if the two trucks have different transmissions.
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68 Chevy CST/10, 50th Anniversary, 327/th400, 373 posi, buckets 68 GMC Shortbox Stepside, 402/th400, Tilt, Tach, Bucket Seats, 3.08 Positraction 69 Chevy Camaro SS, 383, 4 speed, positraction 70 Chevy El Camino SS396, Triple Black, 454/th400, Tach 70 Chevy Shortbox Stepside 4x4, 350/th350, Tilt, Tach, Cab Lights, Bumper Guards, Tow Hooks 70 Chevy 3/4 Longbox, 350/auto, 70k, SURVIVOR 71 Chevy Blazer, CST, 350/auto 71 GMC Sierra K2500, 454, 4 speed, 4.10 posi, 37s 71 Custom/30, Open Road, 350/th400, tilt 72 Chevy Shortbox Fleetside, 496 Stroker/th400, Tilt, Tach, Bucket Seats, 3.42 Posi 72 GMC Sierra Grande 2500. 427/th400, tilt, a/c, tool and stowage, buckets/console, 3.54 posi |
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09-24-2010, 06:15 PM
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#5 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,591
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Re: Is a 4wd rearend the same as 2wd?
Both shock mounts are forward on my '72 K20 (Eaton).
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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09-24-2010, 06:43 PM
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#6 |
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Account Suspended
Join Date: Apr 2007
Location: Powell, Wyoming
Posts: 4,973
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Re: Is a 4wd rearend the same as 2wd?
Spring perches will need to be moved. Sharpie
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09-24-2010, 11:04 PM
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#7 |
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Member #1049
Join Date: Jun 2000
Location: Troy Montana
Posts: 3,940
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Re: Is a 4wd rearend the same as 2wd?
Sharpie is correct.. 2WD leaf spring rear ends have wider spacing than 4x4's on the perches due to the "bulge" in the rear frame rails
Although if its out of a longhorn.. they are the same as 4X4. |
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09-24-2010, 11:41 PM
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#8 |
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Registered User
Join Date: Jul 2001
Location: North Louisiana
Posts: 4,501
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Re: Is a 4wd rearend the same as 2wd?
Good info, thanks guys, that helps a lot.
__________________
Wynne 70 CST short fleet Hugger orange & white, 350/350, ps, pb, air, tilt, tach/vac/speedwarning, original buckets, AM/FM, oak bed floor, shoulder belts, 3.5"/5.5" drop, 20" American Racing VN425s. Build thread 53 Chevy shortbed 69 Camaro Click here to subscribe Chevy GMC International Truck Club Louisiana Charter Member http://www.louisianaclassictruckclub.com |
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