slipping

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    Trans slips a bit at start of 1st gear ONLY in 4x4 LOW

    I have a fairly recently rebuilt 4L60E transmission in my '97 K1500 with 4.3L v6 (4x4 floor shift). It works perfectly in 2WD and 4WD high. In 4x4 Low, from a start, 1st gear seems to slip quite a lot to about 2mph before engaging fully. Given that the trans works perfectly when the transfer...
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