Page 1
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4LHD/4LHDX Application Manual
Powertrain Control Solutions
REV 1.1
Section 1. Transmission Specifications and Attributes
1.1 General Description
The 4LHD/4LHDX is a fully automatic, electronically controlled, RWD/4WD transmission. It consists primarily of a three
element hydraulic torque converter with a converter clutch, two planetary gear sets, various clutches, an oil pump, and
a control valve body. There are four forward driving gear ranges in addition to neutral, reverse, and park. The torque
converter clutch is available in 2nd, 3rd, and 4th (overdrive) gear. Park range is available in applications that do not
exceed the GVW ratings provided in Section 1.2.5. The mass of a complete system package is estimated to be between
87-113 kg (192-250 lb). This does not include cooler lines, radiator, fluid within the external cooling system, shifter cable,
shifter bracket assembly, rear transmission mount isolator, external sensors (such as TPS), and otherwise anything else
vehicle specific not included in Section 1.2.1.
Figure 1.1-1
Rev
Sheet 9
24214609
CASE
ASSEMBLY
REVERSE
INPUT CLUTCH
INPUT CLUTCH
HOUSING
OVERRUN
CLUTCH
FORWARD
CLUTCH
FORWARD
SPRAG CL
ASSEMBLY
3-4
CLUTCH
INPUT
PLANETARY
GEARSET
LO AND
REVERSE
CLUTCH
TORQUE
CONVERTER
ASSEMBLY
STATOR
ROLLER
CLUTCH
PUMP
ASSEMBLY
LO ROLLER
CLUTCH
ASSEMBLY
REACTION
PLANETARY
GEARSET
TURBINE
SHAFT
2-4
BAND
ASSEMBLY
INSIDE
DETENT LEVER
MANUAL
SHAFT
CONTROL VALVE
ASSEMBLY
PARKING LOCK
ACTUATOR ASSEMBLY
OUTPUT
SHAFT
PARKING
PAWL
SPEED
SENSOR
SHIFT SOLENOID
2-4
REVERSE
OVERRUN
FORWARD
FORWARD
3-4
LO/ROLLER
LO/REV.
RANGE
GEAR
1-2
2-3
BAND
INPUT
CLUTCH
CLUTCH
SPRAG CL.
CLUTCH
CLUTCH
CLUTCH
CLUTCH
ASSEMBLY
PARK
ON
*
ON
*
APPLIED
REVERSE
ON
*
ON
*
APPLIED
APPLIED
NEUTRAL
ON
*
ON
*
1st
ON
ON
APPLIED
HOLDING
HOLDING
2nd
OFF
ON
APPLIED
APPLIED
HOLDING
D
3rd
OFF
OFF
APPLIED
HOLDING
APPLIED
4th
ON
OFF
APPLIED
APPLIED
APPLIED
1st
ON
ON
APPLIED
HOLDING
HOLDING
D
2nd
OFF
ON
APPLIED
APPLIED
HOLDING
3rd
OFF
OFF
APPLIED
APPLIED
HOLDING
APPLIED
1st
**
ON
ON
APPLIED
APPLIED
HOLDING
HOLDING
2
2nd
OFF
ON
APPLIED
APPLIED
APPLIED
HOLDING
1
1st
ON
ON
APPLIED
APPLIED
HOLDING
HOLDING
APPLIED
2nd
***
OFF
ON
APPLIED
APPLIED
APPLIED
HOLDING
* SHIFT SOLENOID STATE IS A FUNCTION OF VEHICLE SPEED AND MAY CHANGE IF VEHICLE SPEED INCREASES SUFFICIENTLY IN PARK,
REVERSE OR NEUTRAL. HOWEVER, THIS DOES NOT AFFECT TRANSMISSION OPERATION.
** MANUAL SECOND – FIRST GEAR IS ELECTRONICALLY PREVENTED UNDER NORMAL OPERATING CONDITIONS.
*** MANUAL FIRST – SECOND GEAR IS ONLY AVAILABLE ABOVE APPROXIMATELY 48 TO 56 KM/H (30 TO 35 MPH).
FIGURE 2.1-1 General Arrangement
2.1. General Description
The Hydra-matic 4L60-E is a fully automatic, electronically controlled, rear-wheel drive transmission. It
consists primarily of a three element hydraulic torque converter with a converter clutch, two planetary gear
sets, various clutches, an oil pump, and a control valve body. There are four forward driving gear ranges in
addition to neutral, reverse, and park. The torque converter clutch is available in 2nd, 3rd, and 4th
(overdrive) gear. Park range is available in all GVW applications.
Abuse
Protection
Solenoid
Abuse
Protection
Solenoid