Overdrive Brake

COMPONENTS

DISASSEMBLY OF OVERDRIVE BRAKE

1. CHECK OVERDRIVE BRAKE PISTON MOVING




a. Place the O/D support assembly onto the direct clutch assembly.




b. Apply compressed air into the oil passage as shown, and be sure that the O/D brake piston moves smoothly.




2. REMOVE CLUTCH DRUM THRUST WASHER FROM OVERDRIVE SUPPORT




3. REMOVE PISTON RETURN SPRING
a. Place SST on the spring retainer, and compress the return spring with a shop press.
SST 09350-30020 (09350-07030)
b. Remove the snap ring with a screwdriver.
c. Remove the piston return spring.

4. REMOVE OVERDRIVE BRAKE PISTON




a. Place the 0/D support onto the direct clutch assembly.




b. Hold the O/D brake piston so it does not slant and apply compressed air into the passage to remove the O/D brake piston.
c. Remove the O/D brake piston.
d. Remove the two O-rings from the piston.




5. REMOVE OIL SEAL RINGS

INSPECTION OF OVERDRIVE BRAKE




INSPECT DISC, PLATE AND FLANGE
Check to see if the sliding surface of the disc, plate and flange are worn or burnt. If necessary, replace them.

HINT:
- If the lining of the disc is peeling off or discolored, or even if parts of the printed numbers are defaced, replace all discs.
- Before assembling new discs, soak them in ATF for at least two hours.

ASSEMBLY OF OVERDRIVE BRAKE




1. INSTALL OIL SEAL RINGS
a. Coat the two oil seal rings with ATF.
b. Contract the oil seal rings as shown, and install them onto the O/D support.

NOTE: Do not spread the ring ends more than necessary.

HINT: After installing the oil seal rings, check that they rotate smoothly.




2. INSTALL OVERDRIVE BRAKE PISTON
a. Coat two new O-rings with ATF and install them on the O/D brake piston.
b. Being careful not to damage the O-rings, press in the brake piston into the O/D support with both hands.

3. INSTALL PISTON RETURN SPRING




a. Install the piston return spring.




b. Place SST on the spring retainer, and compress the return spring with a shop press.
SST 09350-30020 (09350-07030)
c. Install the snap ring with a screwdriver. Be sure the end gap of the snap ring is not aligned with the cutout portion of the O/D support.




4. INSTALL CLUTCH DRUM THRUST WASHER
Coat the thrust washer with petroleum jelly and install it onto the O/D support.

HINT: Make sure that the lug shape matches the hole on the O/D support.




5. CHECK OVERDRIVE BRAKE PISTON MOVING
a. Place the O/D support assembly onto the direct clutch assembly.
b. Apply compressed air into the oil passage as shown, and be sure that the O/D brake piston moves smoothly.