I found a lot of Technical Service Bulletin (TSB) information out there. It looks like Chrysler has a lot of problems with transmissions of this nature. Before you start shelling out money to get it repaired, try to talk your local manufacturer dealership into fixing it cheaper based upon the TSBs. Sometimes the dealer will be able to charge the work back to the manufacturer even though there is no warranty left on the vehicle. At minimum they should give you a healthy discount because it is a known problem with that component, and the manufacturer has known about it for several years and didn't issue a recall. It will help if you bring in the relevant TSB wich can be found at:
http://www-odi.nhtsa.dot.gov/tsbs/
I have not tried calling their toll-free number, but you might try that first. If you search the website by your vehicle, there are several TSBs relating to "POWERTRAIN TRANSMISSION," and you can pay them to get more detailed information. Sometimes it's enough if you just bring in the TSB number. The dealership will realize that you know what you are talking about and are not going to be suckered into paying for something that they will be charging back to the manufacturer anyway.
One possible reason for the malfunction and resulting trouble codes is the return filter coming apart, causing fluid pressures to be off. It could also be a solenoid valve getting stuck, or the PCM computer is faulty. It's not likely to require a complete rebuild, but it's something that your average shade-tree guy or gal won't be able to handle.
Good luck, and don't let them snow you!





