1998 ISUZU TROOPER Service Repair Manual

deactivate passenger airbag transmission fluid hood release rear view mirror park assist wheel bolt torque

Page 2177 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±23 AUTOMATIC TRANSMISSION (4L30±E)
Stall Test
The stall test allows you to check the transmission for
internal abrasion and the one way clutch for slippage.
Torque converter performance can also

7A±23 AUTOMATIC TRANSMISSION (4L30±E)
Stall Test
The stall test allows you to check the transmission for
internal abrasion and the one way clutch for slippage.
Torque converter performance can also be evaluated.
The stall test results together with the road test results will
identify transmission components requiring servicing or
adjustment.
Stall Test Procedure:
1. Check the level of the engine coolant, the engine oil,
and the automatic transmission fluid. Replenish if
necessary.
2. Block the wheels and set the parking brake.
3. Connect a tachometer to the engine.
4. Start the engine and allow it to idle until the engine
coolant temperature reaches 70 ± 80C (158 ±
176F).
5. Hold the brake pedal down as far as it will go.
6. Place the selector in the ªDº range.
7. Gradually push the accelerator pedal to the floor.
The throttle valve will be fully open.
Note the engine speed at which the tachometer
needle stabilizes.
Stall Speed : 2,100 +150 rpm
NOTE: Do not continuously run this test longer than 5
seconds.
8. Release the accelerator pedal.
9. Place the selector in the ªNº range.
10. Run the engine at 1,200 rpm for one minute.
This will cool the transmission fluid.
11. Repeat Steps 7 ± 10 for the ª3º, ª2º, ªLº and ªRº
ranges.
Line Pressure Test
The line pressure test checks oil pump and control valve
pressure regulator valve function. It will also detect oil
leakage.
Line Pressure Test Procedure:
1. Check the level of the engine coolant, the engine oil,
and the automatic transmission fluid.
Replenish if required.
2. Block the wheels and set the parking brake.
3. Remove the pressure detection plug at the left side of
the transmission case.
Set 5±8840±0004±0 pressure gauge and adapter to
the pressure detection plug hole.
241RS001
4. Start the engine and allow it to idle until the engine
coolant temperature reaches 70 ± 80C (158 ±
176F).
5. Hold the brake pedal down as far as it will go.
6. Place the selector in the ªDº range.
7. Note the pressure gauge reading with the engine
idling.
8. Gradually push the accelerator pedal to the floor. The
throttle valve will be fully open.
Note the pressure gauge reading with the accelerator
pedal fully depressed.
NOTE: Do not continuously run this test longer than 5
seconds.
9. Release the accelerator pedal.
10. Place the selector in the ªNº range.
11. Run the engine at 1,200 rpm for one minute.
This will cool the transmission fluid.
12. Repeat Steps 7 ± 11 for the ª3º, ª2º, ªLº, and ªRº
ranges.
13. Install a pressure detection plug to the transmission
case, applying recommended thread locking agent
(LOCTITE 242) or its equivalent to thread of plug.
Make sure that thread is cleaned before applying
locking agents.
14. Tighten the pressure detection plug to the specified
torque.
Torque: 9 ± 14N´m (0.9 ± 1.4 kg´m/7 ± 10 lb ft)

Page 2178 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±24
AUTOMATIC TRANSMISSION (4L30±E)
MODELEVERENGINE SPEEDLINE PRESSUREFORCE MOTORMODEPOSITIONENGINE SPEEDkPaPSICURRENT
NORMAL/POWERD,3,2,LIDLE312±36345.2±52.6VARIABLE
WINTERDIDLE312 ± 36345.2 �

Page 2179 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±25 AUTOMATIC TRANSMISSION (4L30±E)
ªPower modeº
Upshift
Range
Throttle
opening1 " 2
(First Gear) (Second Gear)
Km/h (mph)2 " 3
(Second Gear) (Third Gear)
Km/h (mph)3 " 4
(Third Gear) (Fourth G

Page 2180 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±26
AUTOMATIC TRANSMISSION (4L30±E)
Lockup Speed Chart
Transfer gear ratio:High: 1.000
Rear axle ratio:4.555
Lockup ONLockup OFF
D range Throttle
i6%
Mode2nd
Km/h
(mph)3rd
Km/h
(mph)4th
Km/h
(mph)

Page 2181 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±27 AUTOMATIC TRANSMISSION (4L30±E)
Changing Transmission Fluid
There is no need to change the transmission fluid unless
the transmission is used under one or more of the
following heavy duty cond

Page 2182 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±28
AUTOMATIC TRANSMISSION (4L30±E)
Removal
1. Disconnect battery ground cable.
2. Remove transfer control lever knob.
3. Remove front console.
Disconnect wiring harness connectors from front
c

7A±28
AUTOMATIC TRANSMISSION (4L30±E)
Removal
1. Disconnect battery ground cable.
2. Remove transfer control lever knob.
3. Remove front console.
Disconnect wiring harness connectors from front
console.
4. Disconnect shift lock cable (1) from the selector lever
assembly side.
256RW012
5. Disconnect shift control rod (2) from the selector lever
assembly side.
256RW013
6. Disconnect wiring harness connectors from the
selector lever assembly.
7. Remove selector lever assembly.
Installation
To install, follow the removal steps in the reverse order,
noting the following points:
Adjustment of select lever and control rod
1. Place the vehicle on a level surface.NOTE: If the vehicle is not on level surface, the shift
select cable set positions will vary with the movement of
engine. To prevent possible misadjustment of the cable,
the vehicle must be placed on a level surface.
2. Install the shift control rod (1) to the transmission
select lever (2), and then place the lever in the ªNº
position.
3. Set select lever in the ªNº position.
4. Push select lever forward (ªRº position side) and
secure it (using a rubber band (3), etc.) so that the pin
comes into contact with the wall of the detent plate.
5. Install the shift control rod (1) to the selector lever arm
(4).
Torque: 32 Nwm (3.3 kg´m/24 lb ft)
NOTE: Do not apply oil to the threaded portions.
256RW014
6. After adjustment, make sure that the selector lever
operates normally, and that each selector position is
properly indicated. (The red mark shows through the
window.)
Adjustment of shift lock cable
1. Set ignition key in ªLOCKº position and selector lever
in ªPº position.
2. Adjust cable screw cap on selector lever side to
provide a gap (slack for cable) of 1 ± 2 mm between
rod on steering lock side and stopper.
Adjust cap as follows:
a. Pull screw cap (1) in arrow direction to remove
inner cable slack.
b. With cable kept as (a), adjust gap between nut (2)
and bracket to 5 mm (0.2 in).
c. Lock inner cable by turning nut (3) while holding nut
(2) in place.
Torque : 3.7 Nwm (38 kg´cm/33 lb in)
NOTE: Clean the cable threads, and do not apply oil to
them.

Page 2183 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±29 AUTOMATIC TRANSMISSION (4L30±E)
256RW015
3. Check the shift lock operation:
a. Selector lever should not move out of ªPº position
with ignition key in ªLockº position.
b. Selector lever c

Page 2184 of 3573

ISUZU TROOPER 1998 Service Repair Manual 7A±30
AUTOMATIC TRANSMISSION (4L30±E)
249RW001
Procedure 2
a. Place selector lever in neutral.
b. Disconnect transmission harness connector from
mode switch connector.
c. Remove mode switch connecto

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