I have owned this van for4 years still owe 3800 on it. I have had this problem since i bought it in 2005. When the RPMs drop to fast it makes the transmission jump that what it feels like. then I have to pull over and turn it off,restart it then it will run ok. I had the transmission flushed completely and it ran foralmost 3,000 miles with no problems.Transmiision shop put the van on a rack and said its shifting the way its suppose to.Could it be the computer in it? Any ideas would be great. for a long time I changed the speed control sensor which that would help for a while. Thanks for any clues or help!