Figure 23-12. Typical Torque Converter Feed Circuit.
(1) Oil passes from the converter control
(1) The most popular transmission cooler
valve to the torque converter through internally drilled
for use in light vehicles is integral with the engine
passages in the transmission case.
radiator. The cooler is basically a pipe that extends for
the entire length of the inside of the outlet tank of the
(2) The oil enters the torque converter
radiator. As the oil passes through the cooler, a portion
through a clearance between the outside of the stator
of its latent heat is transferred to the engine coolant. The
support and the inside of the converter hub.
oil then returns to the transmission. (It should be noted
that there is no mixing or physical contact between the
(3) After the oil circulates within the
engine coolant and the transmission oil.)
converter, it exits through a clearance between the input
shaft and the inside of the stator support shaft.
(2) In heavy-duty use a separate oil-to-air type cooler is
preferred. This is because in severe use, enough heat
(4) The oil then passes through an
can be generated by the transmission to actually cause
internally drilled passage to the oil cooler outlet.
the engine to overheat if transmission heat is transferred
directly to the engine coolant. The oil-to-air type heat
e. Cooler. The cooler is a heat exchanger that
exchanger is built much the same as an automotive
radiator. It consists of a continuous
is located remotely from the transmission. The following
are the most popular configurations: