Low & Reverse Brake

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. 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 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 Specifications.

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. Refer to "Disassembly".





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
VG33E only: 2.5 mm (0.098 inch)
VG33ER only: 2.7 mm (0.106 inch)
Retaining plate: Refer to Specifications.





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.