I have a 98dodge ram 1500, 5.9 engine when it starts up it runs and shifts fine then it messes up and gets stuck in first gear, and after about a mile it starts shifting but will not downshift below 3rd gear. Codes showing are 1757 and 1763 replaced governor and governor selenoid, still showed codes. P0500 showed up so I replaced vss problem still exists except now the code is 1762. Took it to a tranny shop they said its electrical not tranny. I am goin broke and need help!!! Anyone can help me? PS.All fuses and relays are good.