Torque Converter: Service and Repair

Removing and Installing Torque Converter




- Remove and install transmission. Service and Repair
- Pull torque converter out of primary pump carefully with Special Tool 24 4 000.
IMPORTANT!
- Escaping ATF!




Installation:
- Check torque converter for leaks with Special Tools 24 4 041, 24 4 043 and 24 4 062.
- Test pressure: 0.5 bar (7 psi).
IMPORTANT!
- Always use Special Tool 24 4 043 to prevent injury.




Torque converter must be replaced when bearing surface on converter shaft is damaged




- Turn slightly to guide openings on converter into primary pump carefully, using Special Tool 244 000.
IMPORTANT!
Be careful not to damage converter hearings and seal while guiding in.
Converter is in its correct installed position, if drive ring is below case edge.





Checking Installed Torque Converter:
- Engine and transmission oil must have operating temperature.
- Engine must produce full rated power.
- Start engine.
- Pull on parking brake and operate brake pedal firmly.
- Move selector lever to D and press accelerator pedal to full throttle.
- Read stall speed from tachometer.




IMPORTANT!
Never test stall speed longer than 10 seconds to prevent damage from excessive heat.
Stall Speed Much Above Specified Value.
- a) Converter oil volume insufficient - correct oil level.
- b) Slip in clutches - check clutches.
Stall Speed Much Below Specified Value.
- a) Engine power insufficient check engine.
- b) Converter or pump defective - replace converter or check pump.

Torque converters cannot be cleaned with conventional workshop equipment and must be replaced when a transmission had been defective or an oil filter screen torn. Converter Identification*.