Torque Converter Inspection
After the engine and transmission have been separated measure the depth of the torque converter into the transmissions bell housing. Use this measurement to insure the converter is aligned with the transmission oil pump correctly when reinstalling. Use a straight edge and a tape measure or ruler, and always write things down so you don’t forget.
Always perform a complete inspection of the torque converter when it is removed. Check the drive hub for burrs and scratches. Most of these are easily removed by polishing the hub with a piece of crocus cloth. If the hub has deep scratches or a major groove, usually where the transmission pump seal was riding it must be replaced.
A seized stator will cause overheating resulting in a dark blue hub. If the hub has been overheated a frozen stator is likely the cause. Place the torque converter on a bench and place your fingers through the hub into the splines of the stator. This should turn freely in one direction and feel lock up in the other.
If a torque converter has a bad stator it must be replaced. Check the studs and threaded mounts for stripping and wear. Also check the seams for any signs of leakage and replace the converter if any leaks are evident.
Torque converters will balloon from too much pressure and must be replaced when this happens. This is often found out after hearing a whining sound coming from the front of the transmission.
