Went into limp home mode. No check engine light. Parked it and next day all ok. A few days later, same thing. It only happens after about 10 or so miles of in town driving, but not every time. The engine flares at
2-3? shift point, then kicks into limp home. Just before it happens, the shifts shudder a little. No slippage that I can detect. Can't check at Autozone, as it resets itself when shutting off the engine. Changed fluid and filter with a Chrysler filter from dealer, and Chrysler ATF+4 fluid. Old fluid not burnt,no grit in pan, magnet had very little fuzz on it. Speedometer still works, so output speed sensor is okay. Put in a new input speed sensor, no change. No fluid leakage anywhere. Dealer wants $130 to hook up and test. Any checks I can do myself? I can't seem to find a wiring diagram anywhere for this thing, So if I have to check a circuit, could you please tell me which pin(s) on which connector(s) to check?Ideas I've found on the internet, take with a grain of salt:
1) solenoid pack (install it, you own it)2) EATX? box (Trans Control Module?)
3) TCM relay ( huh?)4) get TCM flashed (it worked before)
4) replace transmission (very expensive)