2006 dodge ram 3500 with 5.9L diesel. Transmission wont shift it it does it goes up and gear and down 2 gears. After two days of it doing this finally got a the code p0720. Replace the output speed sensor and still same issue code went away for about 40miles now back. Transmission wont shifting is even worst now. harness looks good pins are clean in the connector.

 

Wrong section. You want to be in third gen ram.