Coast Clutch Assembly

Coast Clutch Assembly





Special Tool(s)

Disassembly





1. Vehicles equipped with Power Take-Off (PTO) will have a ring gear pressed over the coast clutch cylinder. Do not try to remove the ring gear. If the ring gear shows signs of damage, installation of a new coast clutch cylinder will be necessary.





2. Remove the retaining ring.





3. Remove the coast clutch pressure plate and the clutch plates.





4. Inspect the overdrive one-way clutch for damage to the plastic cage, springs, and rollers. Replace as necessary. Remove the overdrive one-way clutch.





5. Using the special tool, remove the coast clutch return spring.
1 Remove the retaining ring.
2 Remove the return spring.





6. Remove the coast clutch piston and seal assembly.





7. NOTE: If the teeth and or bushing are damaged, a new sun gear will need to be installed.

If required, use an arbor press to remove the sun gear.





8. NOTE: If the shows any signs of damage, install a new coast clutch cylinder.

Inspect the coast clutch assembly.
1 Inspect the bushing.
2 Inspect the No. 1 thrust washer.
3 Inspect the lube hole.





9. Inspect the one-way clutch inner race.
1 Inspect the coast clutch hub overdrive OWC inner race.
2 Inspect all the sealing surfaces.
3 Inspect the sun gear splines.





10. For vehicles equipped with Power Take-Off (PTO), inspect the bearing for damage. If the bearing is damaged, install a new coast clutch cylinder.





11. NOTE: If the coast clutch cylinder shows any signs of damage, install a new coast clutch cylinder.

For vehicles equipped with Power Take-Off (PTO), inspect the one-way clutch inner race.
1 Inspect the coast clutch hub one-way clutch inner race.
2 Inspect the power take-off ring gear teeth for damage.
3 Inspect all sealing surfaces, and lube hole.
4 Inspect the sun gear splines.

Assembly





1. If the sun gear was removed, install the sun gear.





2. NOTE: If the coast clutch piston and seal assembly is damaged, install a new coast clutch piston and seal assembly.

Inspect the coast clutch piston and seal assembly for damage and the check ball for free movement.





3. Using the special tool, install the coast clutch piston.





4. Using the special tool, install the coast clutch retaining ring.
1 Install the return spring.
2 Install the retaining ring.





5. Make sure that the one-way clutch is locked in place. Turn counterclockwise to lock in place. Install the overdrive one-way clutch.





6. Install the coast clutch pressure plate and the clutch plates.





7. Install the retaining ring.





8. Check the stack-up clearance.
1 Using a feeler gauge, measure the stack up clearance in three places, 120 degrees apart, between the snap ring and the coast clutch pressure plate.
If the clearance is not within specification, install the correct coast clutch pressure plate retainer snap ring and recheck the clearance.