AUTOMATIC TRANSMISSION(4AT) > AT Main Case

DISASSEMBLY

1. HIGH CLUTCH AND REVERSE CLUTCH

1. Remove the snap ring, and then take out the retaining plate, drive plate and driven plate.

(A)

Snap ring

2. Remove the snap ring, and then take out the retaining plate, drive plate and driven plate.

(A)

Snap ring

3. Using the ST1 and ST2, remove the snap ring.

ST1    398673600 COMPRESSOR
ST2    498627100 SEAT

(A)

Snap ring

4. Take out the clutch cover, spring retainer, high clutch piston and reverse clutch piston.

(A)

Reverse clutch piston

(B)

Clutch cover

(C)

Return spring

5. Remove the D-ring and lip seal from the high clutch piston and reverse clutch piston.

(A)

High clutch piston

(B)

Reverse clutch piston

2. PLANETARY GEAR AND LOW CLUTCH

1. Remove the snap ring from low clutch drum.

(A)

Snap ring

(B)

Low clutch drum

2. Take out the front planetary carrier.

(A)

Front planetary carrier

(B)

Low clutch drum

3. Take out the rear sun gear.

(A)

Rear sun gear

(B)

Rear planetary carrier

4. Take out the rear planetary carrier, washer and thrust needle bearing.

(A)

Rear planetary carrier

(B)

Low clutch drum

5. Take out the rear internal gear.

(A)

Rear internal gear

(B)

Low clutch drum

6. Remove the snap ring from low clutch drum.

(A)

Snap ring

(B)

Low clutch drum

7. Compress the spring retainer of the low & reverse brake, and remove the snap ring from low clutch drum using ST1 and ST2.

ST1    498627100 SEAT
ST2    398673600 COMPRESSOR

(A)

Snap ring

(B)

Low clutch drum

8. Remove the one-way clutch.

9. Install the one-way clutch inner race to the low clutch drum, and then apply compressed air to remove the low clutch piston.

(A)

Apply compressed air.

(B)

One-way clutch inner race

10. Remove the one-way clutch inner race.

11. Remove the one-way clutch after taking out the snap ring.

(A)

Snap ring

(B)

Plate

(C)

One-way clutch

12. Remove the needle bearing after taking out the snap ring.

(A)

Needle bearing

(B)

Snap ring

3. 2-4 BRAKE

Separate the 2-4 brake piston and piston retainer.

(A)

2-4 brake piston

(B)

2-4 brake piston retainer

4. ONE-WAY CLUTCH INNER RACE

1. Remove the seal ring.

(A)

One-way clutch inner race

(B)

Seal ring

2. Remove the needle bearing using ST.

ST    398527700 PULLER ASSY

5. ONE-WAY CLUTCH OUTER RACE

1. Remove the one-way clutch after taking out the snap ring.

(A)

Snap ring

(B)

Plate

(C)

One-way clutch

2. Remove the needle bearing after taking out the snap ring.

(A)

Needle bearing

(B)

Snap ring