HELP! I have a 93 Grand Caravan with 208234 miles. It's been a great van, but sometimes when slowing, the transmission (4speed auto) will drop back into a low gear and stay there no matter what speed I go until I put the vehicle in neutral, turn the ignition off and then restart. Sometimes it goes back to normal and sometimes I have to pull off the road and wait a few minutes. The transmission feels tight the rest of the time. I have replaced the input and output sensors. The transmission was rebuilt about 60k ago. I have heard of this happening to other Dodge drivers, but don't have a clue where to start.