1994 town & country van,moves perfect in the drive gear,goes nowhere in the reverse .can you help.? I replaced the filter,fluid,has no leaks,if it is electronic can you give me the location of the sensors if any.?

When your tranny starts to go the first thing that goes is the reverse. You need to find a good transmission specialist that isn't going to rip you off. What state do you live in?

Yes, sounds like time to get it rebuilt or replaced.