Isuzu Trooper (1998-2002 year). Manual - part 722

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–85

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NOTE:

1. 2 or 3 people are reguired removal and installation of the

valve body assembly and pressure control solenoid.

2. The check valve assembly (1) and the C0 accumulator

piston springs (2) will fall from the transmission case during
removal of valve body assembly.
Protect these parts from damage.
The B0 (3), C2 (4), and B2 (5) accumulator piston and
springs may also fall free and must be protected.

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INSTALLATION

To install, follow the removal steps in reverse order, noting the
following points;

1. Reinstall the parts removed with the valve body assembly

to their assigned positions in the transmission case (check
valve assembly, C0 accumulator pistons, etc). Install the
valve body assembly to the transmission case.
Refer to 

“REASSEMBLY OF MAJOR COMPONENTS (2).”

2. Solenoid clamp bolt 

3. Valve body fixing bots

Each bolt location and length(mm) is indicated in the figure.

N·m(kg·cm / lb·in)

Torque

7 (70/61)

N·m(kg·cm / lb·in)

Torque

10 (100/87)

7A–86

AUTOMATIC TRANSMISSION (AW30-40LE)

TRANSMISSION REMOVAL AND INSTALLATION

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Removal Steps

1. Transfer protector

2. Rear sound cover

3. Front sound cover

4. Rear propeller shaft

5. Front propeller shaft

6. Exhaust pipe

7. Harness connector

8. Front console, selector lever assembly, and 

transfer control lever

9. Transfer case assembly

10. ATF cooler pipe and clamp

11. Under cover and flex plate-torque converter 

bolt

12. Rear mounting nut

13. 3rd crossmember

14. Oil level gauge and tube

15. Starter

16. Engine-transmission bolt

17. Transmission assembly

Installation steps

To install, follow the removal steps in reverse order.

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–87

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REMOVAL

Preparation:

• Remove engine hood.

• Disconnect negative (–) battery cable.

1. Transfer protector

2. Rear sound cover

3. Front sound cover

4. Rear propeller shaft

5. Front propeller shaft

NOTE:  
Apply alignment marks on the flange at both front and rear
sides.

6. Exhaust pipe

• Remove the 2nd front exhaust pipe from the 1st front

exhaust pipe and exhaust silencer.

7. Transmission harness connector

• Disconnect the harness connectors from the

transmission.

8. Front console, selector lever assembly, and transfer

control lever

• Disconnect the transfer control lever knob.

• Remove the front console.

• Disconnect the harness connector.

• Remove the selector lever assembly.

• Disconnect the shift control rod from the transmission.

9. Transfer case assembly

• Disconnect the breather hose from the transfer case.

• Remove the transfer case assembly from the

transmission.

10. ATF cooler pipe and clamp

•

Disconnect two ATF cooler pipes from A/T side.

• Remove oil pipe clamp from torque converter housing

side.

• Loosen oil pipe clamp bolt at engine mount side.

7A–88

AUTOMATIC TRANSMISSION (AW30-40LE)

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11. Under cover and flex plate-torque converter bolt

• Remove the under cover.

• Turn the crankshaft to gain access to each bolt. 

Remove the six torque coverter fixing bolts.

NOTE:  
New fixing bolts should be replaced for reassembly.

12. Rear mounting nut

• Support transmission with a jack.

• Remove two rear mounting nuts from the 3rd

crossmember.

13. 3rd crossmember

14. Oil level gauge and tube

15. Starter

• Remove the mounting bolts, and pull the starter toward

the front of the vehicle.
Lay the starter alongside the engine.

16. Engine-transmission bolt

• Remove engine-transmission fixing bolts.

• Disconnect the breather hose from the breather hose 3

way (W/TOD) or 2 way (WO/TOD).

17. Transmission assembly

NOTE:  
Keep the oil pan positioned down. 
Be careful not to let the torque converter slide out.