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    4L80E won't shift out of 1st

    I bought a 1995 gmc 2500 4x4 last fall with a 5.7 liter and 4L80E. It was not running at the time and had been sitting for at least a year as of October 2001. I ended up putting a rebuilt engine in it this spring. I drove it for about 100 miles, and everything was fine. It ran and shifted...
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