Overdrive (Case Side)

Disassembly





1. Measure clearance between retaining ring (1) and brake backing plate (2) with thickness gauge. If it is not within standard range, replace brake disc or brake plate.
Clearance between retaining ring and brake backing plate
Standard: 0.40 - 0.90 mm (0.016 - 0.035 inch)





2. Remove retaining ring (1), brake backing plate (2), brake disc (3), brake plate (4), cushion brake plate (5) in that order. Then remove planetary ring gear, thrust bearing race and thrust rear bearing.





3. Remove retaining ring (1), retainer (2) and piston return spring (3).





4. Blow air into fluid hole in O/D case (2) and remove brake piston (1).
5. Remove brake piston inner ring and brake piston outer ring from brake piston.
6. Unsnap seal ring (1).





7. Remove 2 seal rings (1).

NOTE: Be careful not to open seal ring more than necessary.

Reassembly
Install each component by reversing removal procedure and noting the following points.
^ When installing rear seal ring, use care not to open it too wide.
^ Apply A/T fluid to O-ring, disc, etc. before installing them.





^ Opening of retaining brake front ring (2) and projection (1) of O/D case should be matched.
^ When installing each component, refer to "Overdrive (Case Side) Components:".





^ Install cushion brake plate (1) so that it warps convexly.
^ As a final step, measure clearance between retaining brake front ring and brake backing plate again.
Clearance between retaining brake front ring and brake backing plate
Standard: 0.40 - 0.90 mm (0.016 - 0.035 inch)

Inspection





^ Measure free length of piston return spring.
Standard free length of piston return spring 15.10 mm (0.594 inch)