P0740 Torque Converter Clutch, No RPM Drop at Lockup

SYMPTOM
P-0740 TORQ CONV CLU, NO RPM DROP AT LOCKUP

WHEN MONITORED
Continuously with the key on.

SET CONDITION
If the TCC cannot achieve the desired drop in engine RPM when the TCC solenoid is near maximum duty cycle. Three consecutive bad tests are required to set the code.

POSSIBLE CAUSES
- Torque converter defective
- Transmission fluid contaminated
- Transmission internal problems
- "MISFIRE TROUBLE" code set