Low and Reverse Brake

DISASSEMBLY
1. Check operation of low & reverse brake.
a. Apply compressed air to oil hole of transmission case.
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.
^ Fluid might be leaking past piston check ball.





2. In order to remove piston, apply compressed air to oil hole of retainer while holding piston. Apply air gradually and allow piston to come out evenly.





3. Remove O-rings from piston.

INSPECTION

Low And Reverse Clutch Snap Ring, Spring Retainer And Return Springs
^ Check for deformation, fatigue or damage. If necessary, replace.
^ When replacing spring retainer and return springs, replace them as a set.





Low And Reverse Brake Drive Plate
^ Check facing for burns, cracks or damage.
^ Measure thickness of facing.
Thickness of drive plate:
Standard value: 1.8 mm (0.071 inch)
Wear limit : 1.6 mm (0.063 inch)
If not within wear limit, replace.





ASSEMBLY
1. Install O-rings on piston. Apply ATF to both parts.





2. Set and align piston with retainer. This operation is required in order to engage the protrusions of piston to return springs correctly. Refer to the Assembly procedure.





3. Install driven plates, drive plates, retaining plate and dish plate on transmission case. Take care with order of plates and direction of dish plate.





4. install snap ring.





5. Measure clearance between driven plate and transmission case. If not within allowable limit, select proper retaining plate (front side).
Specified clearance:
Standard: 1.7 - 2.1 mm (0.067 - 0.083 inch)
Allowable limit: 3.1 mm (0.122 inch)
Thickness Of Retaining Plates Part No. And Thickness:
31667-80x00: 2.0 mm (0.079 inch)
31667-80x01: 2.2 mm (0.087 inch)
31667-80x02: 2.4 mm (0.094 inch)
31667-80x03: 2.6 mm (0.102 inch)
31667-80x04: 2.8 mm (0.110 inch)
31667-80x05: 3.0 mm (0.118 inch)
31667-80x06: 3.2 mm (0.126 inch)
31667-80x07: 3.4 mm (0.134 inch)
31667-80x09: 9.0 mm (0.354 inch)