1998 ISUZU TROOPER manual transmission

7A±14
AUTOMATIC TRANSMISSION (4L30±E)
Chart 2: No Forward Gears In Any Range/No Reverse
StepActionYe sNo
1Check line pressure. Refer to Line Pressure Test in this section.
Was line pressure normal?
Go to Step 2
Use Chart 15a:
Possible Causes
of Low Line
Pressure in this
section
21. Check internal linkage:
± Manual linkage (58) not moving manual valve (326).
2. Check for internal mechanical damage:
± Turbine shaft (506) broken loose.
± Overrun roller clutch (516) broken loose.
Was the problem found?
Repair or replaceÐ
Chart 3: No Engine Brake In Any Range
StepActionYe sNo
1Check line pressure. Refer to Line Pressure Test in this section.
Was line pressure normal?
Go to Step 2
Use Chart 15a:
Possible Causes
of Low Line
Pressure in this
section
21. Check for overrun clutch leaks caused by:
± Damaged piston lip (513)
± Check ball defective (504)
2. Check for overrun lockout valve (705) stuck by foreign
material.
3. Check for leaks at turbine shaft (506) caused by:
± Teflon seal rings damaged (508)
± Excessive wear of turbine shaft bearing surfaces.
Was the problem found?
Repair or replaceÐ

7A±38
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 and exhaust protectors.
4. Drain fluid.
5. Remove exhaust pipe and disconnect oxygen sensor
connector.
6. Support transfer case with a jack and remove third
crossmember.
7. Remove sixteen 10 mm screws, main case oil pan,
magnet and gasket.
8. Remove three 13 mm oil filter fixing screws, then
remove oil filter.
9. Remove two 13 mm manual detent fixing screws,
then remove roller and spring assembly.
10. Disconnect wiring harness from band control
solenoid and shift solenoids. Pull only on connectors,
not on wiring harness.
11. Remove four 13 mm servo cover fixing screws, then
remove servo cover and gasket.
12. Remove seven 13 mm valve body fixing screws.

Disconnect the ground wire from the main case
valve body.
13. 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).
14. Remove transfer plate gasket from main case.
15. Remove two check balls from main case.
Installation
1. Install two check balls to main case.
244RW002
2. Inspect electrical 4 pin connector and seal of main
case. Replace if necessary.3. Use two 5±8840±0022±0 (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 (2.0 kg´m/15 lb ft)
243RS008
5. Install 8.5 mm connector of ground wire the head of
this valve body bolt and reinstall it. Tighten the bolt to
the specified torque.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)
244RW001
6. Remove two guide pins from main case.
7. Install servo cover gasket, cover, and four 13 mm
screws. Tighten the screws to the specified torque.
Torque: 25 Nwm (2.6 kg´m/18 lb ft)

7A±39 AUTOMATIC TRANSMISSION (4L30±E)
8. Connect wiring harness to band control and shift
solenoids.
9. Install roller and spring assembly to manual detent.

Install two 13 mm screws, and tighten them to the
specified torque.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)
10. Install oil filter and three 13 mm screws. Tighten the
screws to the specified torque.
Torque : 20 Nwm (2.0 kg´m/15 lb ft)
11. Install oil pan gasket, magnet, oil pan and sixteen 10
mm screws. Tighten the screws to the specified
torque.
Torque: 11 Nwm (1.1 kg´m/96 lb in)
12. Install third crossmember and rear mount. Tighten the
bolts and nuts to the specified torque.
Torque
Third crossmember bolt:
50 Nwm (5.1 kg´m/37 lb ft)
Rear mount nut: 50 Nwm (5.1 kg´m/37 lb ft)
13. Install exhaust pipe and connect oxygen sensor
connector. Tighten the bolts to the specified torque.
Exhaust pipe flange bolt torque:
43 Nwm (4.4 kg´m/32 lb ft)
14. Install transfer and exhaust protectors. Tighten the
bolts to the specified torque.
Torque: 37 Nwm (3.8 kg´m/27 lb ft)
15. Fill transmission through overfill screw hole of oil pan,
using ATF DEXRON)±III, refer to Changing
Transmission Fluid in this section.
16. Connect battery ground cable.

7A±44
AUTOMATIC TRANSMISSION (4L30±E)
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 5 pin 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 4 pin
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 and ground
wire 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 4 pin connector.

Remove gasket transfer plate from main case.
13. Remove two check balls (13) from main case.
240RW022
14. Turn transmission to vertical position to drain fluid.
Return back to horizontal position when drained.

Install 5±8840±0501±0 (J±23075) servo piston
spring compressor with offset to the rear of case.

Compress servo piston assembly.
Remove servo piston retaining ring (14).

Slowly release servo piston assembly (15).

Remove tool.
15. Remove servo piston assembly (15), return spring
(16), and servo apply rod (17).

7A±54
AUTOMATIC TRANSMISSION (4L30±E)
241RW009
241RW019
43. 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
44. Inspect servo piston seal ring. Replace if necessary.

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

Install 5±8840±2274±0 (J±38428) servo piston
fitter in servo bore.

Install apply rod (40), round end toward band, return
spring (41) and piston assembly (42).
45. Install the 5±8840±0501±0 (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 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 torque. Be certain the adjusting
screw does not turn.

7A±55 AUTOMATIC TRANSMISSION (4L30±E)
242RW008
46. Install two check balls (44).
244RW002
47. Inspect main case electrical connector and seal,
replace if necessary.

Install electrical 4 pin connector/main case and
wiring harness.
48. Install two 5±8840±0022±0 (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 (2.0 kg´m/15 lb ft)

Pass ground wire of adapter case wiring harness
assembly through the hole joining adapter fluid area
and main case fluid area.

Assemble 8.5 mm connector of ground wire under
the head of this valve body bolt and reinstall it.

Remove two guide pins.
244RW001
49. Install servo cover gasket, cover (46) and four 13 mm
screws.
Torque: 25 Nwm (2.6 kg´m/18 lb ft)
50. Connect wiring harness (47) to band control, shift
solenoids, and main case 4 pin connector.
51. Install manual detent roller and spring assembly (48)
with clip.

Install two 13 mm screws.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)
52. Install oil filter (49), and three 13 mm screws.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)
53. Install oil pan gasket, magnet, main oil pan (50), and
sixteen 10 mm screws.
Torque: 11 Nwm (1.1 kg´m/96 lb in)
54. Inspect adapter case electrical connector and seal.
Replace if necessary.

Install electrical five pin connector and harness
assembly (52) in bottom of adapter case.
55. Install gasket, transfer plate, and gasket.

Install adapter case valve body (51) and seven 13
mm screws.
Torque: 20 Nwm (2.0 kg´m/15 lb ft)

7A±59 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±60
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 5±8840±2270±0 (J±3387±2) guide
pins.

Install two 11mm bolts.
Torque: 13 Nwm (1.3 kg´m/113 lb in)
244RW004

Install gasket (transfer plate/main case).