Isuzu Trooper (2000 year). Manual - part 387

7A–68

AUTOMATIC TRANSMISSION (4L30–E)

248RS008

2. Install twelve springs (3) and spring seat (2). 
3. Place retaining ring (1) onto spring seat.

D

Compress the piston springs, using the J–23075
piston spring compressor and J–23075–12
adapter.

CAUTION: Do not over stress the springs and seat.
Do not let the spring seat catch in the ring groove.
This may cause damage to the spring seat.

D

Install spring seat retaining ring (1).

D

Remove the piston spring compressor and adapter.

7A–69

AUTOMATIC TRANSMISSION (4L30–E)

Sprag Unit

Disassembled View

248RS009

Legend

(1) Retaining Ring
(2) Sprag Outer Race
(3) Ring

(4) Sprag Assembly
(5) Ring
(6) Third Clutch Hub and Sun Gear Assembly

Disassembly

1. Remove the sprag outer race, retaining ring, and

sprag assembly from the third clutch hub and sun
gear assembly.

2. Remove the rings and sprag assembly from the sprag

outer race.

Inspection And Repair

Visual Check:

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

Reassembly

NOTE: Flared shoulder of the sprag cage faces the sun
gear. This procedure must be followed exactly to be sure
that the sprag assembly is installed properly.

1. Install rings and sprag assembly onto the third clutch

hub and sun gear.

2. Install sprag outer race and retaining ring assembly

over the sprag cage assembly.

D

Place third clutch hub and sun gear assembly on a
flat surface, sun gear facing up.  Place sprag outer
race and sprag assembly over the sun gear
assembly, push down and turn the input sun
counterclockwise at the same time. 

NOTE: Check correct rotation by holding the sun gear in
your left hand and turning the outer race.  The outer sprag
race should turn freely towards you and should lock
turning away from you.

248RS010

7A–70

AUTOMATIC TRANSMISSION (4L30–E)

Second Clutch

Disassembled View

247RW001

Legend

(1) Retaining Ring
(2) Ring Gear
(3) Retaining Ring
(4) Spacer
(5) Clutch Plates

(6) Waved Washer
(7) Retaining Ring
(8) Spring Seat
(9) Springs

(10) Piston Assembly

(11) Second Clutch Drum

Disassembly

1. Remove retaining ring (1) from second clutch drum

(11). 

2. Remove ring gear (2), retaining ring (3), and spacer

(4). 

3. Remove clutch plates (5) and waved washer (6). 
4. Remove retaining ring (7) using J–23327 compressor

to compress the spring seat (8).

5. Remove spring seat (8), springs (9) and piston

assembly (10) from second clutch drum (11). 

247RS006

7A–71

AUTOMATIC TRANSMISSION (4L30–E)

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.
Movement indicates proper check ball operation.
Replace the piston if the check ball is missing or falls out.

Reassembly

1. Install piston assembly (10) into the second clutch

drum (11).

D

Lubricate the lip seal with  transmission fluid.  Use
the J–23080–A second clutch piston installer to
protect the outer piston lip seal.

NOTE: Lip of the seal should point toward front of
transmission.

D

Remove the installer.

247RS007

2. Install twenty–two piston springs (9) and spring seat

(8) on the second clutch piston (10).  Place retaining
ring (7) onto spring seat.

D

Use the J–23327 compressor to compress the
piston springs.

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

D

Remove the compressor.

3. Install waved plate (6) and clutch plates (5).  Start with

a steel plate and alternate with lined plates.

D

Align second clutch inner tangs.

4. Install spacer (4), with the fluted end toward clutch

plates.

5. Install retaining ring (3), ring gear (2) and retaining

ring (1).