Reverse Clutch

COMPONENTS

DISASSEMBLY




1. Check operation of reverse clutch.
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. If 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 drive plates, driven plates, retaining plate, dish plate and snap ring.




3. Remove snap ring from clutch drum while compressing clutch springs.
- Do not expand snap ring excessively.
4. Remove spring retainer and return spring.




5. Install seal ring onto oil pump cover and install reverse clutch drum. While holding piston, gradually apply compressed air to oil hole until piston is removed.
- Do not apply compressed air abruptly.
6. Remove D-ring and oil seal from piston.

INSPECTION

Reverse clutch snap ring and spring retainer
- Check for deformation, fatigue or damage.




Reverse clutch return springs
- Check for deformation or damage. Also measure free length and outside diameter.





Reverse clutch drive plates
- Check facing for burns, cracks or damage.
- Measure thickness of facing.

Thickness of drive plate:
Standard value: 2.0 mm (0.079 in)
Wear limit: 1.8 mm (0.071 in)

- If not within wear limit, replace.

Reverse clutch dish plate
- Check for deformation or damage.




Reverse clutch piston
- Shake piston to assure that balls are not seized.
- Apply compressed air to check ball oil hole opposite the return spring. Make sure there is no air leakage.
- Also apply compressed air to oil hole on return spring side to assure that air leaks past ball.

ASSEMBLY




1. Install D-ring and oil seal on piston.
- Apply ATF to both parts.




2. Install piston assembly by turning it slowly and evenly.
- Apply ATF to inner surface of drum.




3. Install return springs and spring retainer.




4. Install snap ring while compressing clutch springs.




- Do not align snap ring gap with spring retainer stopper.







5. Install drive plates, driven plates, retaining plate and dish plate.




6. Install snap ring.




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

Specified clearance:

Standard
0.5 - 0.8 mm (0.020 - 0.031 in) (RE4R01A)
0.6 - 0.9 mm (0.024 - 0.035 in) (RE4R03A)

Allowable limit
1.2 mm (0.047 in) (RE4R01A)
1.4 mm (0.055 in) (RE4R03A)





8. Check operation of reverse clutch.