Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
I would first verify fluid levels at full operating temperature. The torque converter will have a hard time keeping lock up if oil is low because oil pressure drops. TC could also be limited by dirty oil, you could add a bit of transmission fix fluid to increase torque converter pressure.
The torque converter clutch (TCC) solenoid valve is a pulse width modulation (PWM) solenoid. When vehicle operating conditions are appropriate for TCC application, the transmission control module (TCM) begins the TCC duty cycle at approximately 42 percent. The TCM then increases the duty cycle up to 90 percent, in order to achieve full TCC apply pressure.
When the TCC PWM solenoid valve is de-energized, the solenoid blocks filtered 2-3 drive fluid, and allows TCC signal fluid to exhaust. When energized, the solenoid modulates fluid into the TCC signal fluid circuit. When fully energized, modulation stops, and the solenoid blocks both 2-3 drive fluid and TCC signal fluid exhaust.
When the TCM detects a high TCC slip speed when the TCC is commanded ON, then DTC P0741 sets. DTC P0741 is a type B DTC.
Never drive faster than your guardian angel can fly