One problem related to transmission not engage has been reported for the 1997 Plymouth Voyager. The most recently reported issues are listed below.
I was at a stop sign waiting for a clear road to take a left, I started to pull out when a vehicle came over a crest to the left cuasing me to change my mind. My nose was in the road a little, so I put it in reverse to back up, the transmission would not engage. I put it in drive, it still would not engage(like being in neutral). After sitting there stuc for a few minutes, it finally started to work again. Fortunately I wasn't hit. Today the same thing happened again, only this time I was backing out of my driveway. It was cold both days if that had anything to do with it. My first occurence was a safety concern to me.