ISUZU AXIOM 2002 Service Repair Manual

7A±67 AUTOMATIC TRANSMISSION (4L30±E)
e. Converter hub scored or damaged.
f. Internal failure in stator.
g. Contamination from engine coolant.
h. Excess end play.

Rotate transmission, bell housing up. Spin
converter to insure proper fit.62. Fill transmission through the overfill screw hole of oil
pan, using ATF DEXRON)±III. Refer to
Changing
Transmission Fluid in this section.
240RY002

7A±68
AUTOMATIC TRANSMISSION (4L30±E)
Converter Housing And Oil Pump Assembly
Disassembled View
241RY001
Legend
(1) Converter Housing
(2) Outer Seal Ring
(3) Gasket(4) Wear Plate
(5) Oil Pump Assembly
(6) Oil Seal Ring
Disassembly
1. Remove oil pump assembly from converter housing.
2. Remove outer seal ring.
3. Remove gasket.
4. Remove wear plate.
5. Remove oil seal ring.
Inspection And Repair
Visual Check:
If any damage, deformation, or local wear is found in a
converter housing, outer seal ring, wear plate, or oil seal
ring, replace it.
Reassembly
1. Install wear plate onto oil pump assembly.
2. Install converter housing onto complete oil pump
assembly. Align with two short J±38588 guide pins on
outer bolt holes.

Loosely install five 13mm bolts.

Center converter housing using J±38557 centering
tool.
Tighten five inner 13mm bolts in an alternating
pattern.
Torque: 20 Nwm (15 lb ft)
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3. Install oil seal ring (3 screws).
Torque: 3 Nwm (26 lb in)
4. Install gasket.
5. Install outer seal ring.

7A±69 AUTOMATIC TRANSMISSION (4L30±E)
Oil Pump
Disassembled View
241RY002
Legend
(1) Oil Pump Drive Gear
(2) Oil Pump Driven Gear
(3) Pin
(4) Plug
(5) Seal Ring
(6) Torque Converter Clutch Control Valve
(7) Converter Clutch Control Valve Spring
(8) Pin
(9) Converter Clutch Regulator Sleeve
(10) Converter Clutch Regulator Spring
(11) Converter Clutch Regulator Valve
(12) Isolator Spring
(13) Isolator Valve
(14) Pin(15) Enable Valve Spring Guide
(16) Enable Valve Spring
(17) Enable Valve
(18) Snap Ring
(19) Spring Seat
(20) Throttle Signal Accumulator Spring
(21) Throttle Signal Accumulator Piston
(22) Sleeve Pin
(23) Boost Valve Sleeve
(24) Boost Valve
(25) Spring Seat
(26) Pressure Regulator Valve Spring
(27) Spring Seat
(28) Pressure Regulator Valve
(29) Oil Pump Assembly
Disassembly
1. Remove oil pump drive gear (1) and driven gear (2).
2. Remove pin (3) from oil pump assembly (29).
3. Remove plug (4) and seal ring (5), torque converter
clutch control valve (6) and spring (7).
4. Remove pin (8) from oil pump assembly (29).5. Remove torque converter regulator sleeve (9),
converter clutch regulator spring (10), converter
clutch regulator valve (11), isolator spring (12) and
isolator valve (13).
6. Remove pin (14) from oil pump assembly (29).
7. Remove enable valve spring (16), spring guide (15)
and enable valve (17).
8. Remove snap ring (18) from oil pump assembly (29).

7A±70
AUTOMATIC TRANSMISSION (4L30±E)
9. Remove spring seat (19), spring (20) and throttle
signal accumulator piston (21).
10. Remove sleeve pin (22) from oil pump assembly (29).
11. Remove boost valve sleeve (23), boost valve (24),
spring seat (25), valve spring (26), spring seat (27),
and pressure regulator valve (28).
Inspection And Repair
Visual Check:
If any damage, deformation or wear is found, replace the
damaged part.
Reassembly
1. Lubricate and preinstall pressure regulator spring
seat (27) on valve (28), with the flat side against
shoulder.
2. Install pressure regulator valve (28) and spring seat
(27) assembly, valve spring (26), and spring seat (25)
with the flat side away from spring to oil pump
assembly (29).
3. Assemble boost valve (24) into sleeve (23).
4. Install boost valve and sleeve assembly, and sleeve
pin (22) to oil pump assembly (29).
5. Install throttle signal accumulator piston (21), spring
(20), and spring seat (19), with the flat side away from
the spring, and snap ring (18) to oil pump assembly
(29).
6. Install enable valve (17), spring guide (15), enable
valve spring (16) and retainer pin (14) to oil pump
assembly (29).
7. Assemble torque converter regulator spring (10) and
torque converter regulator valve (11) into sleeve (9).
8. Install isolator valve (13), isolator valve spring (12)
and the torque converter regulator sleeve and valve
assembly into the oil pump assembly (29).
9. Install torque converter clutch control valve spring (7),
torque converter clutch control valve (6), plug (4) and
seal ring (5), and retainer pin (3) to oil pump assembly
(29).
10. Install oil pump driven gear (2) and drive gear (1).

7A±71 AUTOMATIC TRANSMISSION (4L30±E)
Main Case Valve Body
Disassembled View
244RS010
Legend
(1) Gaskets and Transfer Plate
(2) Manual Valve
(3) Band Control Solenoid
(4) Pin
(5) Waved Washer
(6) Spring Pin
(7) Solenoid A
(8) Retainer
(9) 1±2/3±4 Shift Valve
(10) Spring
(11) Spring Pin
(12) Solenoid B
(13) Retainer
(14) 2±3 Shift Valve(15) Spring
(16) Spring Pin
(17) Plug
(18) Spring
(19) Low Pressure Control Valve
(20) Spring Pin
(21) Plug
(22) Band Control Screen Assembly
(23) Spring Pin
(24) Plug
(25) 1±2 Accumulator Valve
(26) 1±2 Accumulator Control Valve
(27) Check Ball
(28) Main Case Valve Body
Disassembly
1. Remove two 11mm bolts from valve body (28), then
remove gaskets and transfer plate (1).
2. Remove manual valve (2).
3. Push in band control solenoid (3) to compress waved
washer (5), and remove pin (4).
4. Remove band control solenoid (3) and waved washer
(5).5. Remove spring pin (6) with a 3 mm dia punch.
6. Remove solenoid A (7) by grasping the metal tip. Do
not grasp the connector housing.
7. Remove retainer (8), 1±2/3±4 shift valve (9), and
spring (10).
8. Remove spring pin (11) with a 3 mm dia punch.
9. Remove solenoid B (12) by grasping the metal tip. Do
not grasp the connector housing.

7A±72
AUTOMATIC TRANSMISSION (4L30±E)
10. Remove retainer (13), 2±3 shift valve (14), and spring
(15).
11. Remove spring pin (16), plug (17), spring (18), and
low pressure control valve (19).
12. Remove spring pin (20), plug (21), and band control
screen assembly (22).
13. Remove spring pin (23), plug (24), 1±2 accumulator
valve (25), and 1±2 accumulator control valve (26).
14. Remove check ball (27) from valve body (28).
Inspection And Repair
Inspect for the following, and replace any damaged or
worn parts:
1. Damage or wear to each valve.
2. Damage in oil passeges.
3. Cracks or damage to valve body.
4. Valve operations.
5. Spring fatigue.
Reassembly
1. Install 1±2 accumulator control valve (26), 1±2
accumulator valve (25), plug (24), and spring pin (23).
2. Install band control screen assembly (22), plug (21),
and spring pin (20).
3. Install low pressure control valve (19), spring (18),
plug (17), and spring pin (16).
4. Install spring (15), 2±3 shift valve (14), retainer (13),
solenoid B (12), and spring pin (11).
5. Install spring (10), 1±2/3±4 shift valve (9), retainer (8),
solenoid A (7), and spring pin (6).
6. Install waved washer (5), band control solenoid (3),
and pin (4).
7. Install manual valve (2).
8. Install check ball (27) to valve body (28).9. Install gasket (valve body/transfer plate) and transfer
plate using two J±3387±2 guide pins.

Install two 11mm bolts.
Torque: 13 Nwm (113 lb in)244RS004

Install gasket (transfer plate/main case).

7A±73 AUTOMATIC TRANSMISSION (4L30±E)
Adapter Case Valve Body
Disassembled View
243RY001
Legend
(1) Bracket
(2) Converter Clutch PWM Solenoid
(3) Retainer
(4) Force Motor Solenoid
(5) Retainer
(6) Plug
(7) 3/4 Accumulator Valve
(8) 3/4 Accumulator Control Valve(9) Spring
(10) Retaining Ring
(11) Feed Limit Valve
(12) Plug Retainer
(13) O±Ring
(14) Plug
(15) Force Motor Screen Assembly
(16) Adapter Case Valve Body
Disassembly
1. Remove 11mm bolt from valve body.

Remove bracket (1) and converter clutch PWM
solenoid (2).
2. Remove 11mm bolt and retainer (3) from valve body.

Remove force motor solenoid (4).
3. Remove retainer (5), plug (6), 3/4 accumulator valve
(7), and 3/4 accumulator control valve (8).
4. Remove spring (9), retaining ring (10), and feed limit
valve (11).
5. Remove plug retainer (12), O±ring (13), plug (14),
and force motor screen assembly (15).

Use 5 mm bolt to pull plug.
Inspection And Repair
Inspect for the following, and replace any damaged or
worn parts:
1. Damage or wear to each valve.
2. Damage in oil passeges.
3. Cracks or damage to valve body.
4. Valve operations.
5. Spring fatigue.

7A±74
AUTOMATIC TRANSMISSION (4L30±E)
Reassembly
1. Install force motor screen assembly (15), plug (14),
O±ring (13), and plug retainer (12).
2. Install feed limit valve (11), retaining ring (10), and
spring (9).
3. Install 3/4 accumulator control valve (8), 3/4
accumulator valve (7), plug (6), and retainer (5).
4. Install force motor solenoid (4).

Place solenoid terminals pointing towards mating
face.

Install retainer (3) and bolt.
Torque: 10 Nwm (87 lb in)
5. Install converter clutch PWM solenoid (2) with two
O±rings (2) and bracket (1) to valve body.

Install bolt.
Torque: 10 Nwm (87 lb in)

7A±75 AUTOMATIC TRANSMISSION (4L30±E)
Third Clutch And Sprag Unit
Disassembled View
248RW001
Legend
(1) Retaining Ring
(2) Input Sun Gear and Sprag Unit Assembly
(3) Retaining Washer
(4) Bearing(5) Thrust Washer
(6) Clutch Plates
(7) Third Clutch Spring Cushion Plate
(8) Third Clutch Drum Assembly
Disassembly
1. Place the third clutch drum and intermediate shaft
assembly upright, using the overdrive internal gear as
a support.
2. Locate the ends of the retaining ring. Depress one
end of the ring using a small screwdriver instead of
the depressor handle provided with the tool
J-38450-A. Slide one blade down between the third
clutch drum and the retaining ring.
3. Remove a screwdriver and repeat this step for the
other end of retaining ring.
4. Install the remaining four blades approximately (five)
notches apart using a screwdriver to depress the
retaining ring.
5. Pull up on input sun gear and sprag unit assembly (1
and 2) to release the retaining ring from third clutch
drum assembly (8).
6. Remove the tool blades.
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7. Remove retaining washer (3), bearing (4), thrust
washer (5), and clutch plates (6 and 7) from the third
clutch drum assembly (8).
Inspection And Repair
Visual Check:
If any damage, deformation or wear is found, replace the
damaged part.

7A±76
AUTOMATIC TRANSMISSION (4L30±E)
Reassembly
1. Place third clutch drum and intermediate shaft
assembly upright, using the overdrive internal gear as
a support.
2. Install third clutch spring cushion plate (7), bevel face
down.
3. Install third clutch plates (6) into third clutch drum
assembly (8). Start with the steel clutch plate and
alternate with lined plates.
4. Install thrust washer (5), bearing (4), and retaining
washer (3).
5. Fully engage the hub splines of the input sun gear and
sprag unit assembly (2) into the third clutch inner
tangs.

Simultaneously rotate the outer sprag race to
engage into the third clutch drum assembly (8).
6. Place J-38450-A blades between the retaining ring
and the third clutch drum apporximately (five)
notches apart, and one blade at each end of the
retaining ring (1). Push down on sprag assembly until
the assembly is seated into the third clutch drum
assembly (8).
7. Remove the tool blades and engage retaining ring
into groove of third clutch drum.
248RX002