9-19-1TX / TXH / TXB 180S - 400L (Rev. 4/23/07)TX / TXH / TXB 180S - 400L (Rev. 4/23/07)
DRAIN PLUGDRAIN PLUG
OILOIL
DIPSTICKDIPSTICK
OIL SUMPOIL SUMP
SCREENSCREEN
MAIN / STEERINGMAIN / STEERING
PUMPPUMP
CONTROLCONTROL
VALVEVALVE
Illustration Illustration 9-1. 9-1. TC-32 TC-32 TransmisTransmissionsion
Introduction.Introduction. The TC-32 transmission is a pow-The TC-32 transmission is a pow-
ershift transmission which provides three speedsershift transmission which provides three speeds
forward and forward and three speeds three speeds reverse. reverse. Both directionBoth direction
and speed range are controlled by a roll shiftand speed range are controlled by a roll shift
mechanism attached to the steering column.mechanism attached to the steering column.
Operation.Operation. With the engine running, the trans-With the engine running, the trans-
mission’s converter charging pump draws trans-mission’s converter charging pump draws trans-
mission oil from the transmission sump throughmission oil from the transmission sump through
the oil sump screen and directs it through thethe oil sump screen and directs it through the
pressure regulating valve and pressure regulating valve and oil filteroil filter. . The pres-The pres-
sure regulating valve maintains pressure to thesure regulating valve maintains pressure to the
transmission control valve for actuating the direc-transmission control valve for actuating the direc-
tion and stion and speed clutches. peed clutches. This requires This requires only aonly a
small amount small amount of transmission of transmission oil. oil. The remainingThe remaining
oil is directed through the torque converter circuitoil is directed through the torque converter circuit
to the transmission oil cooler and returns to theto the transmission oil cooler and returns to the
transmission transmission for positive for positive lubrication. lubrication. After enter-After enter-
ing the converter housing, the oil is directeding the converter housing, the oil is directed
through the stator support to the converter bladethrough the stator support to the converter blade
cavity and exits in the passage between the tur-cavity and exits in the passage between the tur-
bine shaft bine shaft and converter and converter support. support. The oil thenThe oil then
flows out of tflows out of the converter to the oil he converter to the oil coolercooler. . AfterAfter
leaving the cooler, the oil is directed back to theleaving the cooler, the oil is directed back to the
transmission.transmission.
The torque converter turbine receives oil at itsThe torque converter turbine receives oil at its
center. center. The reaction member The reaction member of the torque of the torque con-con-
verter takes the oil which is exhausting from theverter takes the oil which is exhausting from the
inner portion of the turbine and changes its direc-inner portion of the turbine and changes its direc-
tion to allow correct entry for recirculation into thetion to allow correct entry for recirculation into the
and are connected to the output shaft of the con-and are connected to the output shaft of the con-
verter either verter either by direct gearing by direct gearing or drive shaft. or drive shaft. TheThe
purpose of the directional or speed clutches is topurpose of the directional or speed clutches is to
direct the power flow through the gear train to pro-direct the power flow through the gear train to pro-
vide the vide the desired speed desired speed range. range. Refer toRefer to SectionSection
9C9Cfor electrical operation of the transmission con-for electrical operation of the transmission con-
trol valve.trol valve.
TTransmission Oil Level ransmission Oil Level CheckCheck(Illustration 9-1)(Illustration 9-1)..
The oil level of the transmission should beThe oil level of the transmission should be
checked daily, with the oil at normal operatingchecked daily, with the oil at normal operating
temperature [180 to 200temperature [180 to 200
F+ (82 to 93F+ (82 to 93
C+)] andC+)] and
the engine operating the engine operating at low idle. at low idle. The oil levelThe oil level
should be up to the FULL mark on the dipstick.should be up to the FULL mark on the dipstick.
The dipstick is located inside the engine hood, onThe dipstick is located inside the engine hood, on
the engine’s right side.the engine’s right side.
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