i have a 2002 dodge grand caravan awd es w/3.8 engine. it runs great when moving, but when i stop at the light or stop sign, the speeddometer shows im doing 20mph or its jumping around like mad and the van starts jerking. but when its driving down the road it runs good. i was told to change the output speed sensor on the trany, did that and still the problem is there. also when i start going from stop it feels like its missing but i did a tune up.i had the chilton book but thats no help. its giving me the run around

 

Classic output sensor symptoms but these sometimes turn into wiring or TCM problems. Are you seeing the check engine light and have you checked for codes? Can do this with either with then "key dance" or a scanner (free at AutoZone). The latter is best. More revealing transmission codes stored in the TCM have to be read with a capable scanner.

 

Welcome to DF
Did you look at the wire harness going into the output sensor? Sometimes battery acid will get into the connector and cause this problem. You really need to have someone with scan tool to read transmission sensors to find out whats going on.

 

I think your speed meter has developed a problem.I suggest you should get your vehicle inspected by a mechanic so that if there are any faults they could be correctly rectified.

 

abs light is on check engine light was on but it went back out. i'll try autozone and see, i'll get back to ya thanks.

 

If the ABS light is on, Then you need to remove the codes out of the ABS module. Autozone won't have a scanner to that for you. You will need a scanner that can read all modules. Even if the light goes out you will still have stored codes up to 255 key cylces.

 

I had the same symptom with the speedometer, it was bad solder joints on the dashboard instrument panel. It only took a few minutes to pull it out and solder it up. I was glad I did... there were lots of bad joints just waiting to fail.

On the other hand, when the gas gage acted up, it turned out to be the electrical connector on the fuel tank, which was hanging down and getting wet.

I recommend pulling the instrument panel -- its easy and you don't get dirty!

 

got the codes been busy but the codes i got p0500 p0700 p0731 and now the speedometer stopped working and the mileage is is stuck and numbers stay them.