2002 Z71 Transfer Case or Front Diff Issue ?

Discussion in 'Differential & Driveline' started by jss0271q, Jul 24, 2019.

  1. jss0271q

    jss0271q New Member

    Joined:
    Jul 24, 2019
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    1
    I have recently acquired a 2002 Silverado Z1. When accelerating around 25-30 mph i am getting a noise like something flapping hard or shaking rocks in box. I suspected u-joints since there was play in the joint nearest the transfer case and the front shaft spins constantly. I removed the shaft and drove the vehicle and had not noise at all. Replaced the joints and reinstalled the driveshaft and the noise continues. I also noticed a random popping noise in 4wd only. The yoke on the front diff does have a slight amount of play in it not sure if that could attribute to it or not. So my main question is does this sound like a transfer case or front diff issue ?

    Thanks in advance