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2C-2
AUTOMATIC TRANSMISSION
LOCK-UP CLUTCH
CONVENTIONAL
CONVERTER
STATOR
IMPELLER
OIL PUMP
FRONT CLUTCH
REAR CLUTCH
FRONT PLANETARY GEAR SET
EAR PLANETARY GEAR SET
OIL FILTER
KICKDOWN (FRONT) BAND
INPUT SHAFT
FLEXIBLE DRIVE PLATE
ENGINE CRANKSHAFT
Fig. 2C-1
Automatic Transmission Models 999/727
LOCKUP
CONVERTER
90220
AND REVERSE (REAR) BAND
RUNNING CLUTCH
GOVERNOR
REAR BEARING
OUTPUT SHAFT
ADAPTER HOUSING
SEAL
KING LOCK ASSEMBLY
LVE BODY
LL
90520
Fig. 2C-2 Lockup Torque Converter Cross Section
turbine. The torsion springs dampen engine firing im
pulses and absorb shock loads that occur during lockup.
When the transmission shifts into direct drive and
vehicle speed reaches approximately 42 mph (68 km/h),
transmission fluid is channeled through the input shaft
and into the area between the clutch piston and turbine.
At this point, fluid pressure extends the piston pressing
it against the front cover friction material locking the
turbine to the impeller (fig. 2C-3). When vehicle speed
drops below 42 mph (68 km/h) or the transmission shifts
out of direct drive, fluid pressure is released, the clutch
piston retracts, and the converter operates in a conven
tional manner again.
Torque Converter Service
The torque converter is a welded assembly and is not
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Troubleshooting
