1998 ISUZU TROOPER automatic transmission

7A±2
AUTOMATIC TRANSMISSION (4L30±E)
Disassembled View 7A±65. . . . . . . . . . . . . . . . . . . .
Disassemble 7A±65. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection And Repair 7A±65. . . . . . . . . . . . . . . . . .
Reassembly 7A±65. . . . . . . . . . . . . . . . . . . . . . . . . .
Sprag Unit 7A±67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View 7A±67. . . . . . . . . . . . . . . . . . . .
Disassembly 7A±67. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection And Repair 7A±67. . . . . . . . . . . . . . . . . .
Reassembly 7A±67. . . . . . . . . . . . . . . . . . . . . . . . . .
Second Clutch 7A±68. . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View 7A±68. . . . . . . . . . . . . . . . . . . .
Disassembly 7A±68. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection And Repair 7A±69. . . . . . . . . . . . . . . . . .
Reassembly 7A±69. . . . . . . . . . . . . . . . . . . . . . . . . .
3±4 Accumulator Piston 7A±70. . . . . . . . . . . . . . . . . .
Disassembled View 7A±70. . . . . . . . . . . . . . . . . . . . Disassembly 7A±70. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection And Repair 7A±70. . . . . . . . . . . . . . . . . .
Reassembly 7A±71. . . . . . . . . . . . . . . . . . . . . . . . . .
Reverse Clutch Piston And Center Support 7A±72.
Disassembled View 7A±72. . . . . . . . . . . . . . . . . . . .
Disassembly 7A±72. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection And Repair 7A±73. . . . . . . . . . . . . . . . . .
Reassembly 7A±73. . . . . . . . . . . . . . . . . . . . . . . . . .
Overrun Clutch And Turbine Shaft 7A±74. . . . . . . . .
Disassembled View 7A±74. . . . . . . . . . . . . . . . . . . .
Disassembly 7A±74. . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection And Repair 7A±75. . . . . . . . . . . . . . . . . .
Reassembly 7A±75. . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data And Specification 7A±77. . . . . . . . . . . . . .
Special Tools 7A±81. . . . . . . . . . . . . . . . . . . . . . . . . . .
4L30±E Parts List 7A±84. . . . . . . . . . . . . . . . . . . . . . .

7A±3 AUTOMATIC TRANSMISSION (4L30±E)
Service Precaution
WARNING: I F S O E Q U IPPED WITH A
SUPPLEMENTAL RESTRAINT SYSTEM (SRS),
REFER TO THE SRS COMPONENT AND WIRING
LOCATION VIEW IN ORDER TO DETERMINE
WHETHER YOU ARE PERFORMING SERVICE ON OR
NEAR THE SRS COMPONENTS OR THE SRS
WIRING. WHEN YOU ARE PERFORMING SERVICE
ON OR NEAR THE SRS COMPONENTS OR THE SRS
WIRING, REFER TO THE SRS SERVICE
INFORMATION. FAILURE TO FOLLOW WARNINGS
COULD RESULT IN POSSIBLE AIR BAG
DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
Construction
A07RS001
Legend
(1) Torque Converter Clutch (TCC)
(2) Fourth Clutch (C4)
(3) Overrun Clutch (OC)
(4) Overdrive Unit
(5) Reverse Clutch (RC)
(6) Second Clutch (C2)(7) Third Clutch (C3)
(8) Ravigneaux Planetary Gear Set
(9) Brake Band (B)
(10) Overdrive Free Wheel (One Way Clutch)
(OFW)
(11) Sprag Free Wheel (One Way Clutch) (PFW)

7A±4
AUTOMATIC TRANSMISSION (4L30±E)
Range Reference Chart
C07RT010

7A±5 AUTOMATIC TRANSMISSION (4L30±E)
Normal Operation Of 1998 4L30±E
Transmission
Torque Converter Clutch (TCC)
Application Conditions:
The TCC is normally applied in 2nd, 3rd and 4th gears
only when all of the following conditions exist:
Ð The engine coolant temperature is above 70
C
(158
F).
Ð The brake pedal is released.
Ð The shift pattern requests TCC apply.
Moreover, TCC is always applied in 2nd, 3rd and 4th
gears when the transmission oil temperature is above
135
C (275
F).
This mode should be canceled at 125
C (257
F).
ATF Warning Lamp
The ATF warning lamp will be constantly on (not flashing)
if the transmission oil temperature is above 140
C
(284
F).
The ATF warning lamp goes off again when the
transmission oil temperature is below 130
C (266
F).
Special Shift Pattern When The Engine Is
Cold:
A special shift pattern is activated when the engine
coolant temperature is below 70
C (158
F). (3±4 shifts,
for example, are delayed for small throttle openings and
will occur a few MPH higher.)
Diagnosis
Introduction
The systematic troubleshooting information covered by
this Section offers a practical and systematic approach to
diagnosing 4L30±E transmission, using information that
can be obtained from road tests, electrical diagnosis, oil
pressure checks or noise evaluation.
The key to correcting a complaint is to make use of all of
the available symptoms and logically letting them direct
you to the cause.
When dealing with automatic transmission complaints, it
is best to gather as many symptoms as possible before
making the decision to remove the transmission from the
vehicle.
Frequently, the correction of the complaint does not
require removal of the transmission from the vehicle.
Driver Information
To analyze the problem fill out a complete description of
the owner's complaint.
Please draw a circle around the right information and
complete the following form. (The next page is an
example of a completed form). You can draw a circle
around many numbers if you are not sure.

7A±6
AUTOMATIC TRANSMISSION (4L30±E)
F07RT036
Example of form completed.

7A±7 AUTOMATIC TRANSMISSION (4L30±E)
F07RT037

7A±8
AUTOMATIC TRANSMISSION (4L30±E)
General Diagnosis Procedure
F07RT038

7A±9 AUTOMATIC TRANSMISSION (4L30±E)
Preliminary Inspection Chart
F07RT039