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Posi Track

Discussion in 'General Chevy & GM Tech Questions' started by 02z71, Nov 25, 2009.

  1. 02z71

    02z71 Member

    Im looking at an 02 1/2 ton 4x4 Z71. It has elect shift xfer case and supposed to have locking rear diff. Anybody know how that system works? Is it a true locker or limited slip? Does it engage in 4 low only?

    Sorry I got a lotta questions.
  2. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    That has been debated -- I would call the G80 a true locker because it does lock the axles together so that they must spin at the same speed.
    It technically isn't inhibited from locking in high range, but it doesn't lock above about 25 mph. Basic operation of the G80: under normal driving, it acts as an open differential. When one wheel spins faster than the other (~100 rpm) and the overall speed is about 25 mph or less, the mechanism engages to lock the axles together. When the tension is released, the mechanism lets go and returns to open diff operation. We have a fairly long thread here that discusses the G80, you might find it and see if that answers your questions.
  3. 02z71

    02z71 Member

    Thanks, I'll look it up.

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