2002 ISUZU AXIOM manual transmission

7A±49 AUTOMATIC TRANSMISSION (4L30±E)
Valve Body Assembly (Main Case)
Removal
1. Raise the vehicle and support it on jack stands.
2. Disconnect battery ground cable.
3. Remove transfer protector (4y4).
4. Drain fluid.
5. Support transfer case with a jack and remove third
crossmember.
6. Remove sixteen 10 mm screws, main case oil pan,
magnet and gasket.
7. Remove three 13 mm oil filter fixing screws, then
remove oil filter.
8. Remove two 13 mm manual detent fixing screws,
then remove roller and spring assembly.
9. Disconnect wiring harness from band control
solenoid and shift solenoids. Pull only on connectors,
not on wiring harness.
10. Remove four 13 mm servo cover fixing screws, then
remove servo cover and gasket.
11. Remove seven 13 mm valve body fixing screws.
12. Remove main case valve body with manual valve link
and transfer plate. Note the position of the link (long
end into valve, short end into range selector lever).
13. Remove transfer plate gasket from main case.
14. Remove two check balls from main case.
Installation
1. Install two check balls to main case.
244RW002
2. Inspect electrical 7 way connector and seal of main
case. Replace if necessary.
3. Use two J±25025±B guide pin to install main case.

Install valve body assembly and manual valve link.
NOTE: Valve must be extended as the short end of
manual valve link is connected to the range selector lever.
Long end of link goes into valve.4. Install seven 13 mm screws, and tighten them to the
specified torque.
Torque: 20 Nwm (15 lb ft)
243RS008
5. Remove two guide pins from main case.
6. Install servo cover gasket, cover, and four 13 mm
screws. Tighten the screws to the specified torque.
Torque: 25 Nwm (18 lb ft)
7. Connect wiring harness to band control and shift
solenoids.
8. Install roller and spring assembly to manual detent.

Install two 13 mm screws, and tighten them to the
specified torque.
Torque: 20 Nwm (15 lb ft)
9. Install oil filter and three 13 mm screws. Tighten the
screws to the specified torque.
Torque : 20 Nwm (15 lb ft)
10. Install oil pan gasket, magnet, oil pan and sixteen 10
mm screws. Tighten the screws to the specified
torque.
Torque: 11 Nwm (96 lb in)
11. Install third crossmember and rear mount. Tighten the
bolts and nuts to the specified torque.
Torque
Third crossmember bolt: 116 Nwm (85 lb ft)
Rear mount nut: 50 Nwm (37 lb ft)
12. Install transfer protector. Tighten the bolts to the
specified torque (4y4).
Torque: 37 Nwm (27 lb ft)
13. Fill transmission through overfill screw hole of oil pan,
using ATF DEXRON)±III. Refer to
Changing
Transmission Fluid in this section.
14. Connect battery ground cable.

7A±54
AUTOMATIC TRANSMISSION (4L30±E)
Transmission (4L30±E)
Disassembly
NOTE: During the disassembly and reassembly, perform
the following:

Wash each part thoroughly, and blow air through each
oil passage and groove to eliminate blockage.

Seal rings, roll pins, and gaskets should be replaced.

When assembling the components, apply
DEXRON)±III Automatic Transmission Fluid (ATF)
to each seal, rotating part, and sliding part.

Do not dip part facings, such as clutch or brake drive
plates, in cleaner when washing it.
Also, always coat parts with new ATF two or three
times after cleaning with solvent.
1. Remove torque converter (1).

Drain fluid from torque converter.

Attach J±8763±02 holding fixture to the
transmission and set it on J±3289±20 holding
fixture base.
NOTE: Do not overtighten the tool, as case damage may
result.
420RW021
2. Remove O±ring (2) from turbine shaft.
3. Remove two 10mm mode switch screws, selector
lever nut, cover, and mode switch (3).
4. Remove twelve 10mm adapter case oil pan (4) fixing
screws, adapter oil pan, and gasket.
5. Disconnect electrical wiring connections (5) from
solenoids and 4 way connector of adapter case. Pull
on connectors only, not on wiring harness.
6. Remove seven 13mm adapter case valve body (6)
fixing screws, adapter case valve body assembly,
transfer plate, and two gaskets.

Remove wiring harness and 4 way connector.
7. Remove sixteen 10mm main case oil pan (7) fixing
screws, main oil pan, magnet, and gasket.
8. Remove three 13mm oil filter (8) fixing screws and oil
filter.9. Remove two 13mm manual detent (9) fixing screws,
roller and spring, and manual detent.
10. Disconnect wiring harness assembly (10) from band
apply solenoid, shift solenoids, and main case 7 way
connector.
Pull on connectors only, not on wiring harness.
11. Remove four 13mm servo cover (11) fixing screws,
servo cover, and gasket.
12. Remove seven 13mm valve body screws from main
case.

Remove wiring harness assembly (5) from the
adapter case side.

Remove main valve body assembly (12) with
manual valve link and transfer plate. Note the
position of the link (long end into valve, short end
into range selector lever).

Remove 7 way connector.

Remove gasket transfer plate from main case.

7A±65 AUTOMATIC TRANSMISSION (4L30±E)
43. Inspect speed sensor O±ring. Replace if necessary.

Install speed sensor assembly (39) and 10 mm
screw.
Torque: 9 Nwm (78 lb in)
241RW013
241RS004
44. Main case end play measurement
1. Attach axial play checking tool on the extension
housing and set indicator to zero on output shaft.
2. Manually push output shaft upwards.
End play: 0.36mm ± 0.80mm (0.014 in ± 0.031in)
3. Remove axial play checking tool.
4. If end play is not correct, repeat selective washer
selection.
241RS005
45. Inspect servo piston seal ring. Replace if necessary.

Ensure brake band is correctly positioned. Rotate
output shaft if necessary.

Install J±38428 servo piston fitter in servo bore.

Install apply rod (40), round end toward band, return
spring (41) and piston assembly (42).
46. Install the J±23075 servo spring compressor with
offset to rear of case.

Compress servo piston seal ring, using fitter while
tightening the tool screw.

Install servo piston retaining ring (43).

Remove tool.

Adjust the brake band by tightening the servo
adjusting screw to 4.5 N´m (39.8 lb in) torque. Be
certain the lock nut is loose, then back±off the
screw five turns exactly. Hold piston sleeve with
wrench and tighten lock nut to 18.5 N´m (13.6 lb ft)
torque. Be certain the adjusting screw does not
turn.

7A±66
AUTOMATIC TRANSMISSION (4L30±E)
242RW004
47. Install two check balls (44).
244RW002
48. Inspect main case electrical connector and seal,
replace if necessary.

Install electrical 7 way connector/main case and
wiring harness.
49. Install two J±25025±B guide pins into main case.

Install main case valve body complete assembly
(45) and manual valve link.NOTE: Valve must be extended as the short end of
manual valve link is connected to the range selector lever.
Long end of link goes into valve.

Install seven 13 mm screws.
Torque: 20 Nwm (15 lb ft)

Remove two guide pins.
50. Install servo cover gasket, cover (46) and four 13 mm
screws.
Torque: 25 Nwm (18 lb ft)
51. Connect wiring harness (47) to band control, shift
solenoids, and main case 7 way connector.
52. Install manual detent roller and spring assembly (48)
with clip.

Install two 13 mm screws.
Torque: 20 Nwm (15 lb ft)
53. Install oil filter (49), and three 13 mm screws.
Torque: 20 Nwm (15 lb ft)
54. Install oil pan gasket, magnet, main oil pan (50), and
sixteen 10 mm screws.
Torque: 11 Nwm (96 lb in)
55. Inspect adapter case electrical connector and seal.
Replace if necessary.

Install electrical 4 way connector and harness
assembly (52) in bottom of adapter case.
56. Install gasket, transfer plate, and gasket.

Install adapter case valve body (51) and seven 13
mm screws.
Torque: 20 Nwm (15 lb ft)
57. Connect wiring harness harness assembly (52) to
converter clutch PWM solenoid, force motor, and 4
way connector.
58. Install oil pan gasket, adapter case oil pan (53), and
twelve 10 mm screws.
Torque: 11 Nwm (96 lb in)

Rotate transmission, with bottom pan facing down.
59. Install mode switch (54), two 10 mm screws, selector
lever nut, and cover.
10 mm screw
Torque: 13 Nwm (113 lb in)
Nut
Torque: 23 Nwm (17 lb ft)

Adjust using setting tool, refer to
Mode Switch in
this section.
60. Install O±ring (55) on turbine shaft.
61. Install torque converter (56).
The converter assembly must be replaced under any
of the following conditions:
a. Evidence of damage to the pump assembly.
b. Metal particles are found after flushing the cooler
lines.
c. External leaks in hub weld area.
d. Converter pilot broken, damaged, or poor fit into
crankshaft.

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±97 AUTOMATIC TRANSMISSION (4L30±E)
(38) Seal, O±Ring
(39) Reservoir
(42) Gasket, Extension Case
(43) Extension Assembly
(44) Seal, O±Ring/Speed Sensor
(45) Sensor Assembly, Speed
(46) Screw, Speed Sensor
(47) Nut, Output Shaft/Drive Flange
(48) Seal, O±Ring/Drive Flange
(49) Flange, Drive
(50) Seal, Extension Assembly
(52) Screw, Extension/Main Case
(53) Spring, Parking Pawl Lock
(54) Pawl, Parking Lock
(55) Connector, Electrical/Main Case
(56) Actuator Assembly, Parking Lock
(57) Nut, Parking Lock Lever
(58) Link, Manual Valve
(59) Pin, Spring
(60) Lever, Parking Lock and Range Selector
(61) Shaft, Selector
(62) Seal, Selector Shaft
(63) Mode Switch Assembly
(64) Screw and Conical Washer Assembly
(65) Shield, Mode Switch
(67) Pan, Bottom/Adapter Case
(68) Gasket, Bottom Pan/Adapter Case
(69) Harness Assembly, Adapter Case
(70) Screw, Valve Body
(71) Valve Body Assembly, Adapter Case
(72) Gasket, Adapter Valve Body
(73) Plate, Adapter Valve Body/Transfer(74) Pan, Bottom/Main Case
(75) Gasket, Bottom Pan/Main Case
(76) Gasket, Oil Drain or Overfill Screw
(77) Screw, Oil Drain or Overfill
(78) Magnet, Chip Collector
(79) Filter Oil
(80) Harness Assembly, Main Case
(82) Roller and Spring Assembly, Manual Detent
(84) Valve Body Assembly, Main Case
(85) Ball, Check
(86) Gasket, Main V.B./Transfer Plate
(87) Plate, Main V.B./Transfer
(88) Gasket, Transfer/Main Case
(89) Screw, Transfer Plate on V.B.
(90) Screw, Servo Cover
(91) Cover, Servo Piston
(92) Gasket, Cover/Servo Piston
(93) Ring, Retaining Servo Piston
(94) Clip, Servo Piston
(95) Nut, Servo Screw
(96) Screw, Servo Piston
(97) Piston, Servo
(98) Seal, Ring/Servo Piston
(99) Spring, Cushion/Servo Piston
(100) Seat, Cushion Spring
(101) Sleeve, Servo Piston Adjust
(102) Rod, Apply/Servo Piston
(103) Spring, Return/Servo Piston
(104) Gasket, Adapter Case/Transfer Plate
(105) Powertrain Control Module
(106) Servo Piston Assembly

7A±99 AUTOMATIC TRANSMISSION (4L30±E)
Valve Body Assemblies
244RS009
Legend
(301) Body, Valve Main Case
(302) Pin, Spring
(303) Solenoid Assembly, ON/OFF N.C.
(304) Valve, 1±2 and 3±4 Shift
(305) Spring, 1±2 and 3±4 (2±3) Shift
(306) Retainer, Valve
(307) Solenoid Assembly, ON/OFF N.O.
(308) Valve, 2±3 Shift
(309) Pin, Spring
(310) Plug, Valve Bore(311) Spring, Valve Low Pressure Control
(312) Valve, Low Pressure Control
(317) Ball, Check
(318) Valve, 1±2 Accumulator Control
(320) Valve, 1±2 Accumulator
(321) Washer, Waved PWM Solenoid
(322) Pin, Solenoid PWM
(323) Solenoid Assembly, Band Control PWM
(324) Screen Assembly, PWM Solenoid
(325) Plug, Screen
(326) Valve, Manual