Sun Gear and No.1 One-Way Clutch

Sun Gear And One-Way Clutch Components AW-4 Automatic Transmission:

DISASSEMBLY

Checking One-Way Clutch Operation:

1. Hold sun gear and turn second brake hub clockwise and counterclockwise. Hub should rotate freely clockwise but lock when turned counterclockwise. Replace one-way clutch and hub if they do not operate properly.

Removing/Installing Brake Hub And Clutch Assembly:

2. Remove one-way clutch/second brake hub assembly from drum.

Removing/Installing Thrust Washer:

3. Remove thrust washer from drum.

Removing/Installing Sun Gear Seal Rings:

4. Remove two seal rings from sun gear.

Removing/Installing Sun Gear:

5. Support sun gear on wood block,. Then remove first sun gear snap ring and separate drum from gear.

Removing/Installing Second Snap Ring:

6. Remove remaining snap ring from sun gear.

Checking Sun Gear Bushings:

7. Measure inside diameter of sun gear bushings with bore gauge or inside micrometer. Maximum allowable diameter is 27.08 mm (1.0661 inch). Replace sun gear if bushing inside diameter is greater than specified.

ASSEMBLY
1. Install first snap ring on sun gear.
2. Install sun gear in drum and install remaining snap ring.
3. Coat replacement seal rings with petroleum jelly and install them on sun gear. Be sure seal ring ends are interlocked.
4. Install thrust washer. Be sure washer tabs are seated in drum slots.

Installing Clutch And Hub Assembly On Sun Gear:

5. Install one-way clutch/second brake hub assembly on sun gear. Deep side of hub flange faces upward.

Checking One-Way Clutch Operation:

6. Check one-way clutch operation again. Hold sun gear and turn second brake hub clockwise and counterclockwise. Hub should turn clockwise freely, but lock when turned counterclockwise.