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Description
Lock-up System
Lock-up Clutch
1. Operation (clutch on)
With the lock-up clutch on, the fluid in the chamber between the torque converter cover and lock-up piston is discharged,
and the converter fluid exerts pressure through the piston against the converter cover, As a result, the converter turbine is
locked on the converter cover firmly. The effoct is to bypass the converter, thereby placing the vehicle in direct drive.
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The power flows by way of:
E n g i n e
I
Drive plate
I
Torque converter
I
Lock-up piston
I
Damper spring
I
Turbine
I
M a i n s h a t t
2. Operation (clutch otl)
With the lock-up clutch oft, the tluid flows in the reverse of "clutch on." As a result, the lock-up piston is moved away
from the converter cover; that is, the torque converter lock-up is released.
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Engine
I
Drive plate
I
Torque converter cover
I
P u m p
I
Turbine
Mainshaft
LOCK-UP PISTON
TOROUE CONVERTER
COVER
: 1
14-38
TURBINE
tl
u
v
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Troubleshooting
