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Potential Tuner
8L90 T87A won't accelerate in drive/reverse
I cannot get my truck to move when hitting the gas. I have a used T87A that is unlocked and was programmed by HP Tuners and I have also tried a fresh new blank T87A I programmed with an MDI. Neither TCM will do anything when I hit the gas pedal in drive or reverse. This is a swap project so I am not sure what else to try. I have tried fast relearns as well. Has anyone encountered this and actually gotten a solution?
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Potential Tuner
Have you tried reflashing the TCM? Mine wouldn't move after a trans relearn until I loaded TCM again.
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Potential Tuner
Did you reflash with the MDI or HP Tuners? I am going to try the unlocked again using the MDI tomorrow.