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    Unhappy 01 SIlverado Front Differential Noise in 2WD

    History: I have a 2001 Silverado 1500 4x4 with 135k miles. i took the front drive shaft out a while ago because i need to replace the u joints. well, i finally got around to putting it back in (20k miles later).

    Problem: once the drive shaft was placed back in ,with the new u-joints, i noticed a noise coming from the front diff. It sounds like a light metallic chaffing noise like there is marble or something Floating around inside the front Drive shaft (i know thats not the case)
    -the noise occurs in 2wd from 20mph and gets more prominent the faster i go.
    -the noise goes away while in 4wd
    -the noise is gone when the front d-shaft is out.
    -the noise is gone in 4wd and gone once put back into 2wd while holding a constant speed. but once i decelerate and accelerate it makes the noise again.

    any Ideas???? I dont think its CV's or the left or right output shaft bearing on the front diff. I think it may be a spider gear or or clutch plates inside the front Difff.

    Please help...
    Last edited by rideing247; 06-07-2011 at 12:19 AM.

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