Just started doing this today. Im a mechanic and am STUMPED. Brake lights work so all good there. Iv taken most of the dash out doing pinpoints and have found nothing. I can use the key slot but tranny shifts crazy. It only shifts at high rpm's. Downshifts very noticeably. Now I took the trans computer out and apart and inspected it and didnt notice any burns. Nothing visible.....Plugged back up and turned key on and shiftlock works. Turn key off and then back on and shiftlock doesnt work. Leave key on, disconnect and reconnect TCU and shiftlock works. Turn key off and back on it doesnt work. What in the world?? Can anybody help??? Thanks
Bo