Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual - part 414

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. 

D

Install two 11mm bolts.

Torque: 13 N

•

m (113 lb in)

244RS004

D

Install gasket (transfer plate/main case).