If the TCC is sticking the car would stall when coming to a stop or would run an additional 300-600 rpm if not engaging.
TCC is dependant on closed loop operation, if you cannot get into closed loop (coolant temp sensor, brake switch) the PCM will not engage the TCC.
The TCC solenoid is controlled by PCM, it commands the TCC to engage.
TCC would not cause slipping, it locks the convertor at designated speed, closed loop, brake switch off.
This sounds like Limp-in mode. If sensor input signals are missing or inadequate for trans operation, PCM will output preset operating signals to trans. This mode will keep car operational and allow it to be driven with reduced trans function and performance.
I am simply saying that if slipping continues, trans will be damaged, so get a diagnosis by a trans shop, or trans will need to be replaced.
Monday, February 2nd, 2009 AT 10:41 PM