Question about Chevrolet Impala
P0745 could be many things but is not relavent.The problem is the p1811 max shift adapt.This must be a 4T65E transmission.The problem is once the transmission reaches a certain amout of wear the computer can no longer compinsate.The transmission will need to be repaired or replaced.Transgo makes a kit that I use in these transmissions that makes them more durable and will keep this code from ever coming back.Let me know if you would like me to help you find a good shop in your area.Thanks
Posted on Apr 13, 2011
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Ensure that the current PCM calibration is correct for the final drive ratio.
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