Isuzu Trooper (1998-2002 year). Service manual - part 739

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–153

PLANETARY SUN GEAR AND NO.1 ONE–WAY CLUTCH

DISASSEMBLY

248RY00050

Disassembly steps

1. One–way clutch and second brake hub

2. Thrust washer (Plastic)

▲

 3. Oil seal ring (Metal)

▲

 4. Snap ring

5. Snap ring

7A–154

AUTOMATIC TRANSMISSION (AW30-40LE)

248RY00051

248RY00052

248RY00053

248RY00054

Important operations

Check operation of No.1 one–way clutch

Hold the planetary sun gear and turn the second brake
hub. The second brake hub should turn freely clockwise
and should lock counterclockwise.
(1) : Free
(2) : Lock

3. Oil seal ring (Metal)

Remove two oil seal rings.

4. Snap ring

Remove the snap ring with snap ring pliers.

INSPECTION AND REPAIR

Check planetary sun gear bushing

Using a dial indicator, measure the inside diameter of the
planetary sun gear bushing.

If the inside diameter is greater than the maximum, replace
the planetary sun gear.

mm (in.)

Maximum inside diameter

27.08 (1.0661)

AUTOMATIC TRANSMISSION (AW30-40LE)

7A–155

REASSEMBLY

248RY00066

Reassembly steps

▲

 1. Snap ring

▲

 2. Sun gear input drum

▲

 3. Snap ring

▲

 4. Oil seal ring (Metal)

▲

 5. Thrust washer (Plastic)

▲

 6. One–way clutch and second brake hub

7A–156

AUTOMATIC TRANSMISSION (AW30-40LE)

248RY00055

248RY00056

248RY00053

248RY00052

Important operations

1. Snap ring

Install snap ring to planetary sun gear.

2. Sun gear input drum

Place a wooden block, etc. as a work stand and place the
planetary sun gear onto it.
Install the sun gear input drum onto the planetary sun gear.

3. Snap ring

Install snap ring with snap ring pliers.

4. Oil seal ring (Metal)

Coat the two oil seal rings with ATF.
Install the two oil seal rings onto the planetary sun gear.

NOTE:  
Do not spread the ring ends too much.