The converter lube and leakage oil is returned to the transmission sump by a flexible hose installed in the
lowest pipe tap hole in the converter housing. This line must have a continuous drop to allow by gravity flow,
leakage oil to return to the transmission sump.
A safety valve is built in the transmission control cover and will open to bypass oil only if an excessive
pressure is built up due to a blocked passage.
With the engine operating at any speed and the turbine and output shafts stationary, the converter is in
a "stall" condition. Full power or wide open throttle "stalls" for more than 30 seconds at a time will generate
excessive heat and may cause converter or transmission seal damage.
The converter pressure regulator valve consists of a valve body, valve spool and back-up spring. The spool
is backed up by a spring to hold the valve closed until a specified oil pressure builds up. The valve is used
to maintain a given pressure within the converter to insure proper performance under all conditions.
FIG. A - Torque Converter Assembly - Cross Section