Low and Reverse Brake

SST:

Preparation

Preinspection




Low and reverse brake operation
Check the low and reverse brake operation by applying compressed air as shown.

Air pressure: 392 kPa {4.0 kg/sq.cm, 57 psi} max.




Clutch clearance
1. Measure the clearance between the retaining plate and the snap ring.
2. If not as specified, replace parts as necessary.
3. Select and install the correct snap ring when assembling.

Low and reverse brake clearance: 2.1 - 2.4 mm {0.083 - 0.094 in}




Disassembly / Inspection / Assembly
1. Disassemble in the order shown in the figure, referring to Disassembly Note.
2. Inspect all parts and repair or replace as necessary.
3. Assemble in the reverse order of disassembly, referring to Assembly Procedure.

Disassembly note




Snap ring
1. Install the SST in the transaxle case as shown.
2. Compress the spring and retainer assembly.
3. Remove the snap ring.
4. Remove the SST, then remove the spring and spring retainer assembly.




Low and reverse brake piston
Remove the low and reverse brake piston by applying compressed air through the fluid passage.

Inspection




Drive plates
1. Measure the facing thickness in three places, and determine the average of the three readings.

Standard: 1.6 mm {0.063 in}
Minimum: 1.4 mm {0.055 in}

2. If not within specification, replace the drive plates.




Spring and retainer assembly
1. Measure the spring free length and check for deformation.

Free length of spring: 14.3 mm [0.563 in]

2. If not within specification, replace the spring and retainer assembly.

Assembly procedure
1. Install the low and reverse brake piston.




1. Apply ATF to the inner and outer seals, and install them onto the low and reverse brake piston.
2. Face the outer seal lip toward the inside by gently rolling it down around the circumference for easier installation into the case.




3. Install the low and reverse brake piston by pushing evenly around the circumference, being careful not to damage the outer seal.




2. Install the spring and retainer assembly.




3. Install the SST in the transaxle case.
4. Compress the spring and retainer assembly.
5. Install the snap ring with snap-ring pliers.
6. Remove the SST.




7. Check the low and reverse brake piston operation.
1. Pour in ATF until the low and reverse brake piston is fully submerged.
2. Check that no bubbles come from between the piston and seals when applying compressed air through the fluid passage.

Air pressure: 392 kPa 4.0 kg/sq.cm, 57 psi






NOTE:
- Installation order: Driven-Drive-Driven-Drive-Driven-Drive-Driven-Drive

8. Install the drive and driven plates.




9. Install the retaining plate.
10. Install the snap ring.




11. Measure the low and reverse brake clearance.
1. Measure the clearance between the snap ring and the low and reverse brake retaining plate.
2. If the clearance is not within specification, adjust it by selecting a proper snap ring.

Low and reverse brake clearance: 2.1 - 2.4 mm {0.083 - 0.094 in}

Snap Ring Sizes:

12. Check the low and reverse brake operation by applying compressed air through the fluid passage as shown in the figure.

Air pressure: 392 kPa {4.0 kg/sq.cm, 57 psi} max.