Workshop

HYDRA-MATIC 6L80 (6 Speed)

CONTROL
PRESSURE
SUPPLY
PRESSURE
(ACTUTOR
FEED LIMIT)
COIL
ASSEMBLY
HOUSING
EXHAUST
VARIABLE
RESTRICTION
CONNECTOR
CONTROL
PRESSURE
SUPPLY
PRESSURE
(ACTUTOR
FEED LIMIT)
COIL
ASSEMBLY
HOUSING
EXHAUST
SPRING
VARIABLE
RESTRICTION
CONNECTOR
ELECTRONIC COMPONENTS (CONT'D)
CLUTCH PRESSURE CONTROL (CPC)
SOLENOIDS 2,3,4 AND 5
NORMALLY-LOW CLUTCH PRESSURE
CONTROL SOLENOIDS 4 AND 5
NORMALLY-HIGH CLUTCH PRESSURE
CONTROL SOLENOIDS 2 AND 3
There are two different types of clutch pressure
control solenoids. Clutch pressure control (CPC)
solenoids 2 and 3 are "normally-high" pressure
control solenoids, as shown in Figure 14, and are
identical to the line pressure control solenoid. Clutch
pressure control (CPC) solenoids 4 and 5 are
"normally-low" pressure control solenoids, as shown
in Figure 13, and are identical to the TCC PC
solenoid.
Figure 13
Figure 14
Clutch Pressure Control Solenoid 2
Clutch Pressure Control Solenoid 3
Clutch Pressure Control Solenoid 4
Transmission Adapt Function
Clutch Pressure Control Solenoid 5
Clutch pressure control (CPC) solenoid 2 controls
fluid flow to the 3-5/reverse clutch regulator valve
and the 3-5/reverse boost valve. When commanded,
the solenoid controls the flow of exhaust fluid out of
the solenoid to maintain a specific commanded
control pressure. This allows the TCM to control the
apply and release of the 3-5 and reverse clutch.
Clutch pressure control (CPC) solenoid 3 controls
fluid flow to the 4-5-6 clutch regulator valve and the
4-5-6 boost valve. When commanded, the solenoid
controls the flow of exhaust fluid out of the solenoid
to maintain a specific commanded control pressure.
This allows the TCM to control the apply and release
of the 4-5-6 clutch.
Clutch pressure control (CPC) solenoid 5 controls
fluid flow to the 1-2-3-4 clutch regulator valve and the
1-2-3-4 boost valve. When commanded, the solenoid
controls the flow of exhaust fluid out of the solenoid
to maintain a specific commanded control pressure.
This allows the TCM to control the apply and release
of the 1-2-3-4 clutch.
Clutch pressure control (CPC) solenoid 4 controls
fluid flow to the 2-6 clutch regulator valve. When
commanded, the solenoid controls the flow of exhaust
fluid out of the solenoid to maintain a specific
commanded control pressure. This allows the TCM
to control the apply and release of the 2-6 clutch.
Programming within the TCM also allows for
automatic adjustments in shift pressure that are based
on the changing characteristics of the transmission
components. As the apply components within the
transmission wear or change over time, the time
required to apply a clutch increases or decreases. In
order to compensate for these changes, the TCM
adjusts the pressure commands to the various pressure
control solenoids, to maintain the original
calibrations. The automatic adjusting process is
referred to as "Adaptive Learning" and is used to
ensure consistent shift feel and increase the
transmission's durability.
The Clutch Pressure Control PC Solenoids are part
of the Control Solenoid Body And TCM Assembly
and are not serviced seperately.
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
14
Copyright © 2007 ATSG
Copyright © 2007 ATSG

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