V6 engines may experience surging while driving. The condition is more noticeable between 40 and 50 MPH while accelerating up a hill/slight incline. Replacing the powertrain control module (PCM) and updating the transmission control module (TCM) software may be required.
Surging While Driving Between 40 and 50 MPH on Dodge Caravan
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tcm and speed senors needed to be replace-part from dodge was 330-other remanufactured tcm modules were less but they would not allow for return or guarentee the lastest updates from dodge was loaded-for the 100 buck i would have saved the headaches would not have been worth it