Question about 1996 Dodge Grand Caravan

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1996 Dodge Grand Caravan 3.3liter with automatic transmission.

My speedometer and gas gage work erratically. My transmission will also shift erratically at times and them sometimes it will work fine. My transmission has been rebuilt ans the 2 speed sensors have been changed and that worked for a brief time and now its doing the same thing again.

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  • uscan37 Jul 16, 2008

    3.8 liter v6 with 4 speed overdrive trans. The 1st time this happened, battery acid was accidentally spilled on wiring. I was not aware of this till a year later. I had transmission rebuilt and it worked fine.about 8-9 months later it began not to shift out of 2nd gear and my speedometer quit working. I spoke to man that did the rebuilt. He gave the indication that the 'electrical signals' were not going to the tranny. Is this a possibly? HELP! My wife wants it towed to a junk yard. Thank You.

  • Anonymous Mar 31, 2014

    transmission runs fine in the morning, when it warms up will not shift out of second gear. trans came out of 99 caravan that ran perfectly. I am thinking transmission control module. also rpm and speedometer erratic movement [ all over ]. I had to swap the neutral switch pigtail , was round pin, went to spade terminals. I am looking for flow chart for these codes......help

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2 Answers

Did they used the right connectors with the new trans speed sensors?

Posted on Aug 16, 2008

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  • Master
  • 868 Answers

It will continue to repeat the same problems because it was not designed right.

Posted on May 24, 2008

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1 Answer

Replaced input and output speed sensors for erratic speedometer. Now the speedometer remains at 0. Anyone have a suggestion on what else could be wrong?


input and out put speed sensors tell the TCM and the ECM the difference between engine rpms and transmission input roms so that the correct gear ratio can be selected
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1 Answer

P0722 FAULT CODE


P0722: Transmission speed signal missing.

There is a turbine speed sensor that detects and reports the speed of the transmission shaft to the computer to help determine shift points. Sometimes this duty is shared by the VSS (vehicle speed sensor) but if your speedometer still works, then the VSS is good and you should replace the TSS (turbine speed sensor). I would guess you are either stuck in 1st gear all the time or your transmission shifts erratically.

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Wont shift out of second, no speedometer, gas gage fluctuates


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3 Answers

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1 Answer

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Does the transmission shift erratically sometimes?

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1 Answer

Vehicle had a rough automatic transmission shift and erratic speedometer when vehicle warmed up. I've replaced both output and input speed sensors. Now the speedometer does not work and transmission won't...


Still sounds like a bad output speed sensor - check scan the TCM for codes and see what you get. Also check the wiring at and near the output speed sensor connector.

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1 Answer

Speedometer runs erratic and transmissions drops to second gear.


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