First, check the fluid level and filter condition. If that checks out ok, flush the entire tranny system. Lastly, take it to a shop. Internal parts may have been broken inside the tranny.
Transmission repairs and replacements can be very costly. As first step, check fluid level and consistency (should be fairly runny without noticeable particles). Next, request (free) estimate from certified mechanic.
999 Ford Explorer 6 cylinder 5R55E automatic transmission slipping in between 2nd gear and 3rd gear but shifts fine when I shift manually on the column and shifts fine,
I have a 1998 Dodge ram that I have owned for about a year. Today I was able to back out of my drive way no problem. At lunch however I could not back up, it does not move. It will engage the gear to reverse but will not move.