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So i unhooked battery, changed TCU for newer model, locked doors w/key & then unlocked w/key, security light functioned normally, went for a drive, still will not shift and max revs to 3k rpm, even flooring it. Ran an ECU diagnosis flashed code 55, but the Transmission diagnosis is still unresponsive, and no A/T light when I first start the key. If I can get some other ideas to get the starter relay to work w/out being jumped, figure out why still no reverse lights, & what is up with the shifting. I don't know if they're individual issues or all connected somehow. PLEASE HELP, can't afford to send to stealership.
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