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4L80E Trans locks up in fwd/rev.

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Old Feb 7, 2021 | 07:18 AM
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From: woodbine, md
Default 4L80E Trans locks up in fwd/rev.

I rebuilt this trans a while back, when installed if wouldn't move fwd/rev, almost acting like it had a trans break. I have had it apart a couple times, making sure everything was in place, clutches lined up, etc. The output shaft is harder to turn, as opposed to a used trans. I have end play. I thought I had checked the pin travel on the band, since I had replaced the fwd/rev band. Is it possible the band is to tight, although I can turn the output shaft?
What else would cause this problem if not a band problem. Thanks
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