Isuzu Trooper (1998-2002 year). Manual - part 670

7A–64

AUTOMATIC TRANSMISSION (4L30–E)

Adapter Case Valve Body

Disassembled View

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Legend

(1) Converter Clutch Solenoid Assembly
(2) Retainer
(3) Force Motor Solenoid
(4) Retainer
(5) Plug
(6) 3/4 Accumulator Valve
(7) 3/4 Accumulator Control Valve

(8) Spring
(9) Retaining Ring

(10) Feed Limit Valve

(11) Plug Retainer

(12)

O–Ring

(13) Plug
(14) Force Motor Screen Assembly
(15) Adapter Case Valve Body

Disassembly

1. Remove 11mm bolt from valve body.

D

Remove converter control solenoid assembly (1).

2. Remove 11mm bolt and retainer (2) from valve body.

D

Remove force motor solenoid (3).

3. Remove retainer (4), plug (5), 3/4 accumulator valve

(6), and 3/4 accumulator control valve (7).

4. Remove spring (8), retaining ring (9), and feed limit

valve (10). 

5. Remove plug retainer (11), O–ring (12), plug (13), and

force motor screen assembly (14). 

D

Use 5 mm bolt to pull plug.

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 force motor screen assembly (14), plug (13),

O–ring (12), and plug retainer (11).

2. Install feed limit valve (10), retaining ring (9), and

spring (8).

7A–65

AUTOMATIC TRANSMISSION (4L30–E)

3. Install 3/4 accumulator control valve (7), 3/4

accumulator valve (6), plug (5), and retainer (4).

4. Install force motor solenoid (3).

D

Place solenoid terminals pointing towards mating
face.

D

Install retainer (2) and bolt.

Torque: 10 N

•

m (1.0 kg·m/87 lb in)

5. Install converter clutch solenoid assembly with two

O–rings (1) to valve body.

D

Install bolt.

Torque: 10 N

•

m (1.0 kg·m/87 lb in)

Third Clutch And Sprag Unit

Disassembled View

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Legend

(1) Retaining Ring
(2) Input Sun Gear and Sprag Unit Assembly
(3) Retaining Washer
(4) Bearing

(5) Thrust Washer
(6) Clutch Plates
(7) Third Clutch Spring Cushion Plate
(8) Third Clutch Drum Assembly

Disassembly

1. Place the third clutch drum and intermediate shaft

assembly upright, using the overdrive internal gear as
a support.

2. Locate the ends of the retaining ring. Depress one

end of the ring using a small screwdriver instead of
the depressor handle provided with the tool
5-8840-2258-0 (J-38450-A). Slide one blade down
between the third clutch drum and the retaining ring.

3. Remove a screwdriver and repeat this step for the

other end of retaining ring.

4. Install the remaining four blades approximately (five)

notches apart using a screwdriver to depress the
retaining ring.

5. Pull up on input sun gear and sprag unit assembly (1

and 2) to release the retaining ring from third clutch
drum assembly (8).

6. Remove the tool blades.

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7A–66

AUTOMATIC TRANSMISSION (4L30–E)

7. Remove retaining washer (3), bearing (4), thrust

washer (5), and clutch plates (6 and 7) form the third
clutch drum assembly (8).

Inspection And Repair

Visual Check:

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

Reassembly

1. Place third clutch drum and intermediate shaft

assembly upright, using the overdrive internal gear as
a support.

2. Install third clutch spring cushion plate (7), bevel face

down.

3. Install third clutch plates (6) into third clutch drum

assembly (8).  Start with the steel clutch plate and
alternate with lined plates.

4. Install thrust washer (5), bearing (4), and retaining

washer (3). 

5. Fully engage the hub splines of the input sun gear and

sprag unit assembly (2) into the third clutch inner
tangs.

D

Simultaneously rotate the outer sprag race to
engage into the third clutch drum assembly (8).

6. Place 5-8840-2258-0 (J-38450-A) blades between

the retaining ring and the third clutch drum
approximately (five) notches apart, and one blade at
each end of the retaining ring (1). Push down on sprag
assembly until the assembly is seated into the third
clutch drum assembly (8).

7. Remove the tool blades and engage retaining ring

into groove of third clutch drum.

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7A–67

AUTOMATIC TRANSMISSION (4L30–E)

Third Clutch

Disassembled View

248RS006

Legend

(1) Retaining Ring
(2) Spring Seat

(3) Springs
(4) Piston Assembly
(5) Third Clutch Drum

Disassemble

1. Compress spring seat using the 5–8840–0501–0

(J–23075) spring compressor and 5–8840–2259–0
(J–23075–12) adapter tool.

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

D

Remove the tool.

D

Remove retaining ring (1).

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2. Release the spring seat (2).

NOTE: Do not let the spring seat catch in the ring groove.

D

Remove spring seat (2) and springs (3).

3. Remove piston assembly (4) from third clutch drum

(5).

Inspection And Repair

Visual check:

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

Operation check:

Shake the piston and listen for check ball movement
indicates proper check ball operation.  Replace the piston
if the check ball is missing or falls out.

Reassembly

1. The lip of the piston seal must point toward the front of

the transmission.  Lubricate the seal lip with
transmission fluid.

D

Install piston assembly (4) into the third clutch drum
(5).  Use the 5–8840–2260–0 (J–23084) third clutch
piston installer to protect the outer seal during
installation.