Part 4

LOW & REVERSE BRAKE

Components





Disassembly



1. Check operation of low and reverse brake.
a. Install seal ring onto oil pump cover and install reverse clutch.
Apply compressed air to oil hole.
b. Check to see that retaining plate moves to snap ring.
c. It retaining plate does not contact snap ring,
- D-ring might be damaged.
- Oil seal might be damaged.
- Fluid might be leaking past piston check ball.




2. Remove snap ring, low and reverse brake drive plates, driven plates and dish plate.




3. Remove low one-way clutch inner race, spring retainer and return spring from transmission case.
4. Remove seal rings from low one-way clutch inner race.
5. Remove needle bearing from low one-way clutch inner race.




6. Remove low and reverse brake piston using compressed air.
7. Remove oil seal and D-ring from piston.

Inspection

Low and Reverse Brake Snap Ring and Spring Retainer
- Check for deformation, or damage.

Low and Reverse Brake Return Springs



- Check for deformation or damage. Also measure free length and outside diameter.




Inspection standard: Refer to image.

Low and Reverse Brake Drive Plates



- Check facing for burns, cracks or damage.
- Measure thickness of facing.

Thickness of drive plate:
Standard value 1.52 - 1.67 mm (0.0598 - 0.0657 inch)
Wear limit 1.40 mm (0.0551 inch)

- If not within wear limit, replace.

Low One-way Clutch Inner Race



- Check frictional surface of inner race for wear or damage.




- Install a new seal rings onto low one-way clutch inner race.
- Be careful not to expand seal ring gap excessively.
- Measure seal ring-to-groove clearance.

Inspection standard:
Standard value: 0.10 - 0.25 mm (0.0039 - 0.0098 inch)
Allowable limit: 0.25 mm (0.0098 inch)

- If not within allowable limit, replace low one-way clutch inner race.

Assembly



1. Install needle bearing onto one-way clutch inner race.
- Pay attention to its direction - Black surface goes to rear side.
- Apply petroleum jelly to needle bearing.




2. Install oil seal and D-ring onto piston.
- Apply ATF to oil seal and D-ring.




3. Install piston by rotating it slowly and evenly.
- Apply ATF to inner surface of transmission case.




4. Install return springs, spring retainer and low one-way clutch inner race onto transmission case.
5. Install dish plate, low and reverse brake drive plates, driven plates and retaining plate.
6. Install snap ring on transmission case.




7. Check operation of low and reverse brake clutch piston.




8. Measure clearance between retaining plate and snap ring. If not within allowable limit, select proper retaining plate.

Specified clearance:
Standard 0.8 - 1.1 mm (0.031 - 0.043 inch)
Allowable limit 2.3 mm (0.091 inch)

Retaining plate: Refer to image.




9. Install low one-way clutch inner race seal ring.
- Apply petroleum jelly to seal ring.
- Make sure seal rings are pressed firmly into place and held by petroleum jelly.


FORWARD CLUTCH DRUM Assembly

Components





Disassembly



1. Remove snap ring from forward clutch drum.
2. Remove side plate from forward clutch drum.




3. Remove low one-way clutch from forward clutch drum.
4. Remove snap ring from forward clutch drum.




5. Remove needle bearing from forward clutch drum.

Inspection

Forward Clutch Drum



- Check spline portion for wear or damage.
- Check frictional surfaces of low one-way clutch and needle bearing for wear or damage.

Needle Bearing and Low One-way Clutch



- Check frictional surface for wear or damage.

Assembly



1. Install needle bearing in forward clutch drum.
2. Install snap ring onto forward clutch drum.




3. Install low one-way clutch onto forward clutch drum by pushing the roller in evenly.




- Install low one-way clutch with flange facing rearward.




4. Install side plate onto forward clutch drum.
5. Install snap ring onto forward clutch drum.


REAR INTERNAL GEAR AND FORWARD CLUTCH HUB

Components





Disassembly



1. Remove rear internal gear by pushing forward clutch hub forward.




2. Remove thrust washer from rear internal gear.




3. Remove snap ring from forward clutch hub.




4. Remove end bearing.




5. Remove forward one-way clutch and end bearing as a unit from forward clutch hub.




6. Remove snap ring from forward clutch hub.

Inspection

Rear Internal Gear and Forward Clutch Hub



- Check gear for excessive wear, chips or cracks.
- Check frictional surfaces of forward one-way clutch and thrust washer for wear or damage.
- Check spline for wear or damage.

Snap Ring and End Bearing



- Check for deformation or damage.

Assembly
1. Install snap ring onto forward clutch hub.



2. Install end bearing.




3. Install forward one-way clutch onto clutch hub.
- Install forward one-way clutch with flange facing rearward.

4. Install end bearing.
5. Install snap ring onto forward clutch hub.




6. Install thrust washer onto rear internal gear.
- Apply petroleum jelly to thrust washer.
- Securely insert pawls of thrust washer into holes in rear internal gear.




7. Position forward clutch hub in rear internal gear.




8. After installing, check to assure that forward clutch hub rotates clockwise.


BAND SERVO PISTON ASSEMBLY

Components





Disassembly



1. Block one oil hole in OD servo piston retainer and the Center hole in OD band servo piston.
2. Apply compressed air to the other oil hole in piston retainer to remove OD band servo piston from retainer.
3. Remove D-ring from OD band servo piston.




4. Remove band servo piston assembly from servo piston retainer by pushing it forward.




5. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, remove E-ring.




6. Remove servo piston spring retainer, return spring C and piston stem from band servo piston.




7. Remove E-ring from band servo piston.




8. Remove servo cushion spring retainer from band servo piston.
9. Remove D-rings from band servo piston.
10. Remove 0-rings from servo piston retainer.

Inspection

Pistons, Retainers and Piston Stem



- Check frictional surfaces for abnormal wear or damage.

Return Springs



- Check for deformation or damage. Measure free length and outer diameter.




Inspection standard: Refer to image.

Assembly



1. Install O-rings onto servo piston retainer.
- Apply ATF to O-rings.
- Pay attention to position of each O-ring.




2. Install servo cushion spring retainer onto band servo piston.




3. Install E-ring onto servo cushion spring retainer.




4. Install D-rings onto band servo piston.
- Apply ATF to D-rings.




5. Install servo piston spring retainer, return spring C and piston stem onto band servo piston.




6. Place piston stem end on a wooden block. While pushing servo piston spring retainer down, install E-ring.




7. Install band servo piston assembly onto servo piston retainer by pushing it inward.




8. Install D-ring on OD band servo piston.
- Apply ATF to D-ring.




9. Install OD band servo piston onto servo piston retainer by pushing it inward.