Part and system guide
Torque Converter
The torque converter connects the engine to an automatic transmission using fluid coupling.
What it does
Lets the engine keep running while stopped and can lock at cruising speed for efficiency.
Failure signs
- Shudder at steady speed
- Slipping feeling
- Higher highway RPM
- P0740 code
- Transmission overheating
Maintenance notes
- Diagnose fluid condition and control codes before condemning the converter.
- Avoid towing or hard driving if slipping is severe.
- Use a transmission-capable scanner for lockup data.