Workshop

HYDRA-MATIC 6L80 (6 Speed)

ELECTRONIC COMPONENTS
A MULTI-PORT ELECTRONIC INJECTION
B MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
C ENGINE SPEED SENSOR
D MANIFOLD AIR TEMP (MAT) SENSOR
E ENGINE COOLANT TEMP (ECT) SENSOR
F TRANSMISSION FLUID TEMP (TFT) SENSOR
G TRANSMISSION MANUAL SHIFT SHAFT
POSITION SWITCH ASSEMBLY
H INPUT SPEED SENSOR (ISS)
I TRANSMISSION FLUID PRESSURE SWITCHES
J OUTPUT SPEED SENSOR (OSS)
K ACCELERATOR PEDAL POSITION (APP) SENSOR
L BRAKE SWITCH
M DRIVER SHIFT CONTROL (DSC) SWITCHES
N OPERATING MODE SELECTION SWITCHES
TRANSMISSION CONTROL
MODULE (TCM)
ENGINE CONTROL MODULE (ECM)
BODY CONTROL MODULE (BCM)
DIAGNOSTIC LINK CONNECTOR
(DLC)
LINE PRESSURE CONTROL SOLENOID
CLUTCH PRES CONTROL SOLENOID 2
CLUTCH PRES CONTROL SOLENOID 3
CLUTCH PRES CONTROL SOLENOID 4
CLUTCH PRES CONTROL SOLENOID 5
TCC PRESSURE CONTROL SOLENOID
SHIFT SOLENOID 1
SHIFT SOLENOID 2
INFORMATION SENSORS ELECTRONIC CONTROLLERS ELECTRONICALLY CONTROLLED
TRANSMISSION COMPONENTS
In the 6L80 transmission, the TCM, both shift
solenoids, all 6 of the pressure control solenoids, the
TFT sensor and fluid pressure switches are contained
in one unit, the Control Solenoid Body and TCM
Assembly, which is located in the bottom pan, as
shown in Figure 6.
Electrical signals from various sensors provide
information to the TCM about vehicle speed, throttle
position, engine coolant temp, fluid temp, range
selector position, engine speed, turbine speed and
operating mode. The TCM uses this information to
determine the precise moment to upshift or
downshift, apply or release the TCC, and
what pressure is needed to apply the clutches. This
type of control provides consistent and precise shift
points and shift quality based on the actual operating
conditions of the vehicle.
Adaptive shift control technology enables the TCM
to continually monitor and compare shift
performance to the optimum shift, and make
adjustments to the factory settings to continually
deliver excellent shift quality.
Figure 6
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
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