Disassembly and Reassembly

Overdrive (Case Side) Disassembly and Reassembly

Automatic Transmission Unit Disassembly

Overdrive (Case Side) Components

Disassembly

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





2) Remove retaining ring and piston return spring using special tool and hydraulic press (1).
Special Tool

(A): 09926-96510

NOTE:
Applying excessive pressure when compressing the piston return spring will deform the spring's plate section.

Do not apply any more pressure than is necessary.





3) Apply compressed air (400 - 800 kPa, 4 - 8 kgf/cm2, 57 - 113 psi) to oil hole (1) in O/D case (2) and remove brake piston.





4) Remove brake piston inner ring and brake piston outer ring from brake piston.
5) Unsnap seal ring (1).
6) Remove 2 seal rings (1).






Reassembly

Overdrive (Case Side) Inspection

Bearing and Race Installation Specification

Reassemble each component by reversing disassembly procedure and noting the following points.

- When installing new rear seal ring, use care not to open it too wide.
- Apply A/T fluid to new 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 Components Overdrive (Case Side) Components.
- Measure clearance between retaining ring (1) and brake backing plate (2) with thickness gauge.
If the clearance is out of specification, select another plate with suitable thickness from the list below and replace it.






Standard clearance between retaining ring and brake backing plate
0.40 - 1.38 mm (0.016 - 0.054 in.)