Close
Transmission does not up shift
1999 Plymouth Grand Voyager

Transmission does not up shift

(1999 Plymouth Grand Voyager)
The transmission does not up shift and the speedometer is inop.
2 answers & 0 comments
Popular Answer
on April 08, 2009
Have the transmission checked out. There is a speed sensor that is used for the transmission and the speedometer that might have a problem. There should be codes stored in the transmission control module.
Sign in to reply
Automatic Transmission Diagnosis
$88 - $111 Learn More
on April 08, 2009
Have the transmission checked out. There is a speed sensor that is used for the transmission and the speedometer that might have a problem. There should be codes stored in the transmission control module.
Sign in to reply
on April 14, 2009
Same thing happened to me on my 1999 Plymouth Voyager. There are two "speed sensors" plugged into your transmission like spark plugs. One is the inlet and the other is the outlet. Good news- They cost only about 20 bucks a piece at the auto part store. The sensors can be a pain to find. Mine were on the driver side of the transmission in the front a few inches behind the radiator. You will need a 1 inch deep socket to get them in. Although the outlet sensor causes the problem you are having, replace them both as long as you are in there. You don't have much room to work on them- so take your time and keep yor cool...
Sign in to reply

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
Shifts fine at start up then drops out of gear after a mile or so or when warmed up
Some times i have to turn the key about 6 or 7 times then it will start