So I got a haynes manual, because I was going to attempt to change out the transmission myself, now I remember the codes the guy told me and said "yup needs to be rebuilt."
These are the codes I think, i'm going to have someone else recheck and make sure, I'll repost tomorrow if I got them wrong. But from what I am reading you were right, Fault Code 63 is in the EEPROM located by the Powertrain Control Module.
Please let me know if any of this means I would actually need the transmission rebuilt.
37 Open or shorted condition detected in the torque converter part throttle unlock solenoid circuit
46 Battery voltage sense imput aboce target charging voltage during engine operation.
53 Internal engine controller fault condition detected.
63 Unsuccessful attempt to write to an EEPROM location by the controller.
*EDIT* Just got this from a really nice site.
Loosing Overdrive or Third
Believe it or not, this is a sign of good design. Rather than having the engine shut down completely, Chrysler designed a "limp home mode" which causes the transmission to only use first and second, as a very visible sign that something is wrong. The immediate reaction should be checking the computer for error codes and changing the transmission fluid. If that fails, it could be a sensor problem or an internal problem. Suggestion is usually to chnage the fluid and filter (maybe flush the fluid too) and make sure that you use the correct amount of the appropriate chrysler fluid - DO NOT USE ANYONE ELSE'S FLUID!
[If the transmission fails after takeoff, check] the electrical terminal that bolts into the computer housing that is mounted on the transmission. This is an electrical terminal and it bolts on to the computer box that is below the radiator fan and mounted on the transmission. Because of the poor design of this terminal it becomes a well and holds water. This happend to me on my 1992 3.3 Voyager. The transmission would not change gears without turning off the ignition to reset the computer. I used air to blow it out and the problem was solved. [I discovered it when replacing the sensors based on the advice on your site.] Webmaster note: Chrysler integrated their engine and transmission computers later in the decade.
*I'm going to find out and post what happens, because if there are any others like me I'm sure they'd like to know these cheap fixes rather then rebuilding the transmission for no reason*
Thursday, October 18th, 2007 AT 9:09 PM