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

This is a discussion on 2wd 10-bolt differential vs. 4wd 10-bolt differential within the Technical / Maintenance forums, part of the General Discussion category; I recently stripped some teeth off my rear differential ring gear. I don't have the money just yet to replace ...

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


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    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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    Registered User daved931's Avatar
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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. Corvette servo, Gibson cat-back, custom tune from Black Bear, AD244 alt. upgrade, Z71 skid plates, Escalade cluster, 2" block + 1.5" crank, 285/75R16 SOLD 1/2012
    2008 Silverado 1500 Z71, Borla catback, block and coil spacer

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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

    “We the people are the rightful masters of both Congress and the courts, not to overthrow the Constitution but to overthrow the men who pervert the Constitution.” -Abe

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    Registered User daved931's Avatar
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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. Corvette servo, Gibson cat-back, custom tune from Black Bear, AD244 alt. upgrade, Z71 skid plates, Escalade cluster, 2" block + 1.5" crank, 285/75R16 SOLD 1/2012
    2008 Silverado 1500 Z71, Borla catback, block and coil spacer

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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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