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Jonathan Mantilla

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  1. Jonathan Mantilla
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  2. Jonathan Mantilla
    No error codes, Everything seems to be in check , i noticed the ecu is not commanding the trans to shift just stays in 1st
  3. Jonathan Mantilla
    Hello everybody, I’m really stumped on this issue I’ve been having on my 4l80e, it’s a 1989 c1500 with a 5.3 ls and 4l80e, the transmission has its own stand alone harness, it was working fine for about a year until one day the transmission did not want to shift, the trans ecu is reading tps , rpm, speed perfectly fine , the transmission is not shifting , only reverse and drive works, cannot manually shift, if I power off the trans ecu the transmission will just got into limp mode and stay in 2nd gear , I’m confused what the issue could be? Any help will be appreciated
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