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4l80e shifting problem by Steve
I have a 91 v2500 suburban that we just swaped from a 6.2 diesel to a 5.7 tbi used the 4l80 that was behind the 6.2 it all works fine when its cold but after about 10 - 15 miles it doesn't shift from 1st to 2nd without bucking like it is shifting back and forthonce you get it into 2nd and on up it works fine till you slow down and at about 7mph it bucks again. has new TPS, ????? HELP Please
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