1998 ISUZU TROOPER clutch

7A±69 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).

Lubricate the lip seal with transmission fluid. Use
the 5±8840±2261±0 (J±23080±A) second clutch
piston installer to protect the outer piston lip seal.
NOTE: L ip o f t h e seal should point toward front of
transmission.

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.

Use the 5±8840±0195±0 (J±23327) compressor to
compress the piston springs.
NOTE: Do not let spring seat catch in ring groove.

Remove the compressor.3. Install waved plate (6) and clutch plates (5). Start with
a steel plate and alternate with lined plates.

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).

7A±72
AUTOMATIC TRANSMISSION (4L30±E)
Reverse Clutch Piston And Center Support
Disassembled View
242RS006
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
Disassembly
1. Install the 5±8840±0195±0 (J±23327) compressor
tool on spring seat, then compress the spring seat.

Remove retaining ring (1).
NOTE: Do not over±stress the springs and seat, as this
will cause damage to the spring seat.

Remove the compressor tool.

7A±74
AUTOMATIC TRANSMISSION (4L30±E)
Overrun Clutch And Turbine Shaft
Disassembled View
252RW005
Legend
(1) Snap Ring
(2) Overdrive Carrier Assembly
(3) Sun Gear
(4) Turbine Shaft
(5) Snap Ring
(6) Backing Plate
(7) Clutch Plates(8) Snap Ring
(9) Overrun Roller Clutch Cam
(10) Roller Clutch Assembly
(11) Overrun Clutch Release Spring Retainer
(12) Diaphragm Spring
(13) Piston Assembly
(14) Overrun Clutch Drum
(15) Turbine Shaft Seal Rings
Disassembly
1. Position overrun clutch assembly upright, using the
overdrive internal gear as a support.

Remove snap ring (1).

7A±75 AUTOMATIC TRANSMISSION (4L30±E)
252RS009
2. Remove overdrive carrier assembly (2), sun gear (3)
and turbine shaft (4).
3. Remove snap ring (5), backing plate (6), and clutch
plates (7).
4. Compress diaphragm spring with the
5±8840±2275±0 (J±23327±91) compressor, then
remove snap ring (8).
252RW011
5. Remove overrun roller clutch cam (9) and roller clutch
assembly (10).
6. Remove overrun clutch release spring retainer (11)
and diaphragm spring (12).
7. Remove piston assembly (13) from overrun clutch
drum (14).
8. Remove turbine shaft seal rings (15).
Inspection And Repair
Overdrive Carrier Check

Check pinion end play with a feeler gauge.
Clearance: 0.24mm±0.64mm (0.0094in±0.025in)
If clearance is outside specified value, replace overdrive
carrier assembly.
252RS011
Visual Check:
If any damage, deformation or local wear is found,
replace the damaged part.
Reassembly
1. Install turbine shaft seal rings (15) with grease
(petroleum jelly).
241RS008

7A±76
AUTOMATIC TRANSMISSION (4L30±E)
2. Install the 5±8840±2269±0 (J±38555) inner installer
on the drum (14).

Pre±install piston assembly into 5±8840±2269±0
(J±38555) outer installer.

Install overrun clutch piston assembly (13). Use the
outer installer while pushing piston into drum (14).

Remove the installer.
252RW012
252RW013
3. Install diaphragm spring (12).
4. Install overrun clutch release spring retainer (11) (lip
faces upwards), overrun roller clutch assembly (10),
and cam (9).
5. Place snap ring loosely on spring retainer.

Hold the 5±8840±2275±0 (J±23327±91)
compressor in a vise and compress piston return
spring with compressor.

Set snap ring (8) in ring groove.

Remove the compressor.
6. Install clutch plates (7), start with steel plate and
alternate with lined plates.
7. Install backing plate (6). 8. Install snap ring (5).
9. Install overdrive sun gear with countersink pointing
downwards.
10. Install the overdrive carrier assembly (2).
NOTE: Tu r n t h e a s sembly in a counter±clockwise
direction only until roller clutch enters the outer race.
After installation, rotate the assembly and listen for loose
rollers.
11. Install turbine shaft (4) and snap ring (1).

7A±77 AUTOMATIC TRANSMISSION (4L30±E)
Main Data And Specification
General Specifications
Remarks
ModelTHM 4L30±E
EngineV6 3.2L 6VD1DOHC
TypeAutomatic four speed overdrive in
4th gear lock±up clutch torque con-
verter
Shift controlHydraulic
Control systemsShift patternElectronicControl systemsShift qualityElectronic
Lock±up clutchElectronic
1st2.856
2nd1.618
Gear ratio3rd1.000
4th (O/D)0.723
Reverse2.000
Gear setNoiseless, high torque capability
Oil usedNameATF DEXRON)±IIIOil usedQ'ty liter (qt)8.6 (9.1)
Torque converter2,100 + 150Stall speed (rpm)
Reverse clutchRC4
Second clutchC26Number of discsThird clutchC36Number of discs
Brake bandDouble wrap
Fourth clutchC42Number of discsOverrun clutchOC1Number of discs
OverdriveOFW10Number of rollers
PrincipalPFW26Number of sprags
Input sun gear30
Pinion gear19
Ravigneaux plan-Long pinion23g
etary gear setRing gear90
Long pinion19Number of teeth
Output sun gear46
Odi l
Sun gear31
Overdrive plane-
tary gear setPinion gear24tary gear set
Ring gear81

7A±81 AUTOMATIC TRANSMISSION (4L30±E)
Special Tools
ILLUSTRATIONTOOL NO.
TOOL NAME
5±8840±0501±0
(J±23075)
Spring compressor (For
servo piston)
5±8840±2258±0
(J±38450±A)
Third clutch snap ring
compressor
5±8840±2259±0
(J±23075±12)
Third clutch spring
compressor adapter
(Use with
5±8840±0501±0
(J±23075))
5±8840±2260±0
(J±23084)
Third clutch piston
installer
5±8840±0195±0
(J±23327)
Third clutch spring
compressor
5±8850±2261±0
(J±23080±A)
Second clutch piston
installer
ILLUSTRATIONTOOL NO.
TOOL NAME
5±8840±2262±0
(J±23085±A)
Selective washer
gauging tool
5±8840±2263±0
(J±23327±90)
Fourth clutch spring
compressor (Use with
5±8840±0195±0
(J±23327))
5±8840±2264±0
(J±38553)
3/4 Accumulator piston
fitter
5±8840±2403±0
(J±41096)
Cover remover (Use
with 5±8840±2266±0
(J±38584))
5±8840±2266±0
(J±38584)
Slide hammer adapter
(Use with
5±8840±0019±0
(J±23907))
5±8840±2267±0
(J±38554)
Fourth clutch piston fitter

7A±82
AUTOMATIC TRANSMISSION (4L30±E)
ILLUSTRATIONTOOL NO.
TOOL NAME
5±8840±2268±0
(J±38588)
Guide pins; adapter
case to main case
5±8840±2269±0
(J±38555)
Overrun clutch piston
seal installer set
5±8840±2270±0
(J±3387±2)
Guide pins; gasket and
transfer plate to valve
body
5±8840±2271±0
(J±25022)
Turbine shaft puller (Use
with 5±8840±0618±0
(J±24773±1))
5±8840±0196±0
(J±23129)
Oil seal remover (Use
with 5±8840±2266±0
(J±23907) and
5±8840±0019±0
(J±38584))
5±8840±2272±0
(J±38557)
Oil pump centering tool
ILLUSTRATIONTOOL NO.
TOOL NAME
5±8840±2273±0
(J±23082±01)
Oil pump rotation tool
5±8840±0022±0
(J±25025±B)
Guide pins; valve body
to main case
5±8840±2274±0
(J±38428)
Servo piston fitter
5±8840±2275±0
(J±23327±91)
Overrun clutch spring
compressor
5±8840±2277±1
(J±38559±A)
3/4 Accumulator piston
cover compressor
5±8840±2278±0
(J±8763±02)
Holding fixture