Isuzu Trooper (1998-2002 year). Manual - part 728

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–109

241RY00006

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241RY00008

3. Stator shaft

Remove 13 bolts, and then remove the stator shaft from oil
pump body.
Then remove drive and driven gear.

INSPECTION AND REPAIR

Make necessary correction or parts replacement if wear,
damage or any abnormal conditions are found through
inspection.

Check oil pump body bushing

Using a dial indicator, measure the inside diameter of the
oil pump body bushing.

If the inside diameter is greater than the maximum, replace
the oil pump body.

Check stator shaft bushing

Using a dial indicator, measure the inside diameter of the stator
shaft bushing.

If the inside diameter is greater than maximum, replace the
stator shaft.

mm (in.)

Maximum inside diameter

38.19 (1.5035)

mm (in.)

Maximum inside 

diameter

Front side

21.58 (0.8496)

Rear side

27.08 (1.0661)

7A–110

AUTOMATIC TRANSMISSION (AW30-40LE)

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241RY00010

241RY00011

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Check tip clearance of both gears

Measure between the gear teeth and the cresent-shaped
part of the pump body.

If the tip clearance is greater than the maximum, replace
the drive gear, driven gear or pump body.

Check body clearance of driven gear

Push the driven gear to one side of the body.
Use a feeler gauge, measure the clearance.

If the body clearance is greater than the maximum, replace
the drive gear, driven gear or pump body.

Check side clearance of both gears

Using a steel straightedge and a feeler gauge, measure the
side clearance of both gears.

If the side clearance is greater than the maximum, replace
the drive gear, driven gear or pump body.

Check oil seal

Check for wear, damage or cracks.
If necessary, replace oil seal.
Pry off the oil seal with a screwdriver.

mm (in.)

Standard tip clearance

0.11–0.14

(0.0043–0.0055)

Maximum tip clearance

0.3 (0.012)

mm (in.)

Standard body clearance

0.07–0.15

(0.0028–0.0059)

Maximum body clearance

0.3 (0.012)

mm (in.)

Standard side clearance

0.02–0.05

(0.0008–0.0020)

Maximum side clearance

0.1 (0.004)

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–111

241RY00013

Using special tool, install a new oil seal.
The oil seal end should be flush with the outer edge of the 
pump body.
Oil seal installer: 5-8840-2256-0 (J-9617)
Coat the oil seal lip with multi purpose grease.

7A–112

AUTOMATIC TRANSMISSION (AW30-40LE)

REASSEMBLY

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Important operations

1. Oil pump driven gear

Place the oil pump body on the torque converter.
Coat the driven gear and drive gear with ATF.
Install the driven gear and drive gear.

Reassembly steps

▲

 1. Oil pump driven gear

2. Oil pump drive gear

▲

 3. Stator shaft

▲

 4. Oil seal ring

▲

 5. O-ring