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Thread: 2wd 10-bolt differential vs. 4wd 10-bolt differential

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    2wd 10-bolt differential vs. 4wd 10-bolt differential

    I recently stripped some teeth off my rear differential ring gear. I don't have the money just yet to replace it with quality parts. Is it possible to pull the differential assembly out of a 10-bolt 2wd housing and swap it into my 10-bolt 4wd housing?

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    Re: 2wd 10-bolt differential vs. 4wd 10-bolt differential

    Housing width is the only difference I am aware of. The actual guts of the differential should be the same. 99 - up trucks use a 8.6" ring gear and the carrier requires different bearings than the 8.5" ring gear used prior to the "NBS" GMT800 trucks. In other words, you could use the parts from a 99 - up in your OBS, but you would need different carrier bearings.

    You didn't mention what you have a for a truck, but I thought I'd put it out there.

    Oh yeah, and 1988 OBS trucks were 28 spline, not 30 spline, so those really won't interchange with much unless you swap axles.
    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, leveling kit, SOLD 8/2016
    2016 Silverado 1500 Z71, 6.2 V8, all stock

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    Re: 2wd 10-bolt differential vs. 4wd 10-bolt differential

    Crap. Totally forgot to mention what we are dealing with here.

    My truck is a 1990 K1500 4wd. The 2wd differential is from a 1991 1/2 ton.

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    Re: 2wd 10-bolt differential vs. 4wd 10-bolt differential

    Any other thoughts/opinions?

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    Re: 2wd 10-bolt differential vs. 4wd 10-bolt differential

    it'll fit fine
    -Alex


    Thanks to:
    Dustin @ Diesel Addiction
    Rick @ Pro Fab Performance
    John @ Kennedy Diesel

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    Re: 2wd 10-bolt differential vs. 4wd 10-bolt differential

    Quote Originally Posted by 01SilvyZ71 View Post
    it'll fit fine
    x2
    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, leveling kit, SOLD 8/2016
    2016 Silverado 1500 Z71, 6.2 V8, all stock

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    Re: 2wd 10-bolt differential vs. 4wd 10-bolt differential

    Awesome. This will be the easiest (cheapest) solution till I can park the truck and rebuild both axles properly. Thanks guys!

    -Seth

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