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difference between 2wd and 4wd rear ends??? 88-84 OBS

This is a discussion on difference between 2wd and 4wd rear ends??? 88-84 OBS within the Technical / Maintenance forums, part of the General Discussion category; Guys I have a 91 K1500, and the rearend is going out. I have a good rear end from a ...

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    difference between 2wd and 4wd rear ends??? 88-94 OBS


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    Guys I have a 91 K1500, and the rearend is going out. I have a good rear end from a friends 94 C1500. Can I pull my 6 lug axles and put them in the 2wd rear end and bolt it in or is there a difference dimensionally?
    Last edited by Hammack; 03-28-2010 at 10:49 AM.

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    Redneck Hillbilly Fix 'er Redliner Raw's Avatar
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    Re: difference between 2wd and 4wd rear ends??? 88-94 OBS

    Quote Originally Posted by Hammack View Post
    Guys I have a 91 K1500, and the rearend is going out. I have a good rear end from a friends 94 C1500. Can I pull my 6 lug axles and put them in the 2wd rear end and bolt it in or is there a difference dimensionally?
    I think spring perch width is an issue. Gotta watch gears too. I'm not sure if the axle splines are the same.
    94 C1500 RCLB, 305/5LM60, 14 BFF, 3500 springs, 4.10's, 265/75LT16's, 235/85LT16's, 4 Wheel Disc conversion

    Quote Originally Posted by WildChevys View Post
    stop riding kirk's d i c k without a helmet and go to bed.

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    Registered User daved931's Avatar
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    Re: difference between 2wd and 4wd rear ends??? 88-84 OBS

    The 2wd housings are 3" narrower. I think the spring perches and the shock mounts may still line up. Axle spline count should be the same (30). Your 4wd axles won't work in a 2wd housing due to the width though.

    Any 4wd axle from 88-98 will bolt right in. Might be a good time to look for a 14 bolt SF.
    1999 2 Door Tahoe 4x4 w/ 14 Bolt SF & TruTrac. All kinds of upgrades, SOLD 1/2012
    2008 Silverado 1500 Z71, leveling kit, exhaust, SOLD 9/2014
    2014 Silverado 1500 Z71, stock for now

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    Redneck Hillbilly Fix 'er Redliner Raw's Avatar
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    Re: difference between 2wd and 4wd rear ends??? 88-84 OBS

    Quote Originally Posted by daved931 View Post
    The 2wd housings are 3" narrower. I think the spring perches and the shock mounts may still line up. Axle spline count should be the same (30). Your 4wd axles won't work in a 2wd housing due to the width though.

    Any 4wd axle from 88-98 will bolt right in. Might be a good time to look for a 14 bolt SF.
    So the pumpkin itself is wider in a 4wd? That's weird, dunno what that would accomplish...
    94 C1500 RCLB, 305/5LM60, 14 BFF, 3500 springs, 4.10's, 265/75LT16's, 235/85LT16's, 4 Wheel Disc conversion

    Quote Originally Posted by WildChevys View Post
    stop riding kirk's d i c k without a helmet and go to bed.

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    Registered User daved931's Avatar
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    Re: difference between 2wd and 4wd rear ends??? 88-84 OBS

    The pumpkin is not wider, the axle tubes are longer. It is to maintain track width as the front track is wider to fit the CV shafts.
    Last edited by daved931; 03-28-2010 at 01:29 PM.
    1999 2 Door Tahoe 4x4 w/ 14 Bolt SF & TruTrac. All kinds of upgrades, SOLD 1/2012
    2008 Silverado 1500 Z71, leveling kit, exhaust, SOLD 9/2014
    2014 Silverado 1500 Z71, stock for now

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    Redneck Hillbilly Fix 'er Redliner Raw's Avatar
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    Re: difference between 2wd and 4wd rear ends??? 88-84 OBS

    Quote Originally Posted by daved931 View Post
    The pumpkin is not wider, the axle tubes are longer. It is to maintain track width as the front track is wider to fit the CV shafts.
    that makes sense. Never thought of that before.
    94 C1500 RCLB, 305/5LM60, 14 BFF, 3500 springs, 4.10's, 265/75LT16's, 235/85LT16's, 4 Wheel Disc conversion

    Quote Originally Posted by WildChevys View Post
    stop riding kirk's d i c k without a helmet and go to bed.

 

 

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