Operation CHARM: Car repair manuals for everyone.

Torque Converter & Transmission Cooling System Cleaning

When the torque converter is replaced, the following actions must take place:

1. All cooler lines must be thoroughly cleaned by Back and Forward Flushing using Service Manual procedure.

2. All coolers (in-tank and auxiliary) must be thoroughly cleaned by Back and Forward Flushing using Service Manual procedure.

3. All Cooler By-Pass Valves (CBV), it equipped, must be removed and thoroughly cleaned using Service Manual procedures. Replace rubber coated sealing washers prior to reinstalling CBV. Replace CBV if damaged or plugged.

4. Perform Transmission Cooler Flow Test - If the Transmission Cooling System fails the Flow Test, the coolers, CBVs or lines must be replaced. If the coolers are to be replaced, use only factory approved service parts.

If the torque converter is not being replaced, the following actions must take place:

1. The torque convener must be thoroughly cleaned:

a. Torque converters with drain plugs can be cleaned using the Rotunda Torque Converter Cleaner Follow the instructions included with the equipment.

b. Torque converters without drain plugs can be cleaned by hand. Partially fill the converter using clean transmission fluid (as recommended for the particular transmission). Hand agitate the converter and then thoroughly drain the fluid. Refill with new fluid, specified for the transmission, and reinstall.

2. All cooler lines must be thoroughly cleaned by Back and Forward Flushing using Service Manual procedure.

3. All coolers (in-tank and auxiliary) must be thoroughly cleaned by Back and Forward Flushing using Service Manual procedure.

4. All Cooler By-Pass Valves (CBV), if equipped, must be removed and thoroughly cleaned using Service Manual procedures. Replace rubber coated sealing washers prior to reinstalling CBV. Replace CBV if damaged or plugged.

5. Perform Transmission Cooler Flow Test - If the Transmission Cooling System fails the Flow Test, the coolers, CBVs or lines must be replaced. If the coolers are to be replaced, use only factory approved service parts.





Required Tools