Isuzu Trooper (2000 year). Manual - part 388

7A–72

AUTOMATIC TRANSMISSION (4L30–E)

3–4 Accumulator Piston

Disassembled View

244RS005

Legend

(1) Snap Ring
(2) Cover

(3) Spring
(4) Piston Assembly

Disassembly

1. Install the J–38559–A cover compressor on adapter

case.

D

Compress piston cover then remove snap ring.

242RS007

2. Install the J–41096 cover remover and J–38584

adapter to center hole of cover.

D

Use the J–23907 slide hammer to remove cover.

3. Remove spring and piston assembly. 

242RW001

7A–73

AUTOMATIC TRANSMISSION (4L30–E)

Inspection And Repair

Visual Check:

If any damage, deformation or wear is found, replace the
damaged part.

Reassembly

1. Place the J–38553 piston fitter into adaptor case and

push the piston into position, using suitable diameter
tube.

D

Remove the piston fitter.

244RS006

2. Install spring and cover.
3. Install snap ring, using the J–38559–A compressor

tool.

D

Install snap ring in groove.

D

Remove the compressor tool.

242RS007

7A–74

AUTOMATIC TRANSMISSION (4L30–E)

Reverse Clutch Piston And Center Support

Disassembled View

242RY001

Legend

(1) Retaining Ring
(2) Spring Seat
(3) Springs
(4) Piston Assembly
(5) Center Support
(6) Gasket
(7) Transfer Plate
(8) Gasket

(9) Restrictor

(10) Retainer Plate

(11) Plug

(12) Spring
(13) Overrun Lock Out Valve
(14) Retainer Plate
(15) Plug
(16) Spring
(17) Reverse Lock Out Control Valve

Disassembly

1. Install the J–23327 compressor tool on spring seat,

then compress the spring seat.

D

Remove retaining ring (1).

NOTE: Do not over–stress the springs and seat, as this
will cause damage to the spring seat.

D

Remove the compressor tool.

7A–75

AUTOMATIC TRANSMISSION (4L30–E)

247RS008

2. Remove spring seat (2) and springs (3). 
3. Remove piston assembly (4). 
4. Remove 8 bolts from center support (5), then remove

center support (5) from adapter case. 

5. Remove gasket transfer plate/outer support (6),

center support transfer plate (7), and gasket transfer
plate/adapter case (8).

6. Remove restrictor (9) from adapter case housing. 
7. Remove retainer plate (10), plug (11), spring (12), and

overrun lock out valve (13) from center support (5). 

8. Remove retainer plate (14), plug (15), spring (16) and

reverse lock out valve (17) from center support (5).

Inspection And Repair

Visual Check:

If any damage, deformation or wear is found, replace the
damaged part.

Reassembly

1. Install reverse lock out valve (17) and spring (16) to

center support.

NOTE: Ensure correct assembly of valve. The spring
should be located over the long small diameter end.

2. Install plug (15) and retainer plate (14). 
3. Install overrun lock out valve (13) and spring (12) to

center support.

NOTE: Ensure correct assembly of valve. The spring
should be located over the long small diameter end.

4. Install plug (11) and retainer plate (10). 
5. Place restrictor (9) in the lube overdrive channel in the

adapter case housing.

242RS005

6. Install gasket transfer plate/adapter case (8), center

support transfer plate (7), and gasket transfer
plate/center support (6). 

7. Install center support (5) with 8 bolts.

Torque : 25 N

•

m (18 lb ft)

8. Install piston assembly (4) into center support (5). 
9. Install twenty four springs (3), spring seat (2), and

retaining ring (1).

D

Install the J–23327 compressor and compress
spring seat (2) and springs (3), then seat snap ring
(1) in groove.

D

Remove the tool.