Discussion Starter · #1 ·
Ok I am at a loss. I am getting a po717 and po715 codes as my O/D light flashes. It shifts very erratic from 2-3 and will not go into overdrive. I have replaced both input and output shaft sensors and even the safety neutral switch as well as the harnes at the SNS itself. I have also flushed the transmission. My speedometer seems to be working fine. The Rpm gauge will drop when it shifts from 2-4 if under hard acceleration. Some of the research I have done says it might be electrical I have tried to trace some of the harnesses to see if there is anything visual but have had no luck and I can't find a wiring diagram. It's an 01 f350 4r100. Any help I am open to. Please and thank you.