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locking differential

  1. Do I have a Stock locking Differential

    I4/I5 Engine & Drivetrain
    Hi Guys, I have a 07' Colorado Z71 4x4 with a 3.7L I5 & 4 speed automatic transmission. I was wondering if I have a stock locking Diff? The reason for this question is that when I make a turn while taking off from a stop sign on a hot rainy day one of my rear wheels breaks loose and the Colly...
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