Overdrive Brake and Coast Clutch Drum Assembly

Overdrive Brake and Coast Clutch Drum Assembly





Special Tool(s)

CAUTION: If new clutch plates are being used, they should be soaked in clean automatic transmission fluid for at least 30 minutes before assembly.

NOTE: Inspect the coast clutch components for damage or wear. Install new components as necessary.
^ Inspect the drum band surface, bushing, and thrust surfaces for damage.
^ Inspect the clutch piston bore, and piston.
^ Check the fluid passages for obstructions. All fluid passages must be clean and free of obstructions.
^ Inspect the clutch plates for damage.
^ Inspect the clutch springs.

1. Disassemble the components in the order indicated in the illustration and table.











2. To assemble, reverse the disassembly procedure.

Item 5: Retaining Ring Disassembly Note





1. WARNING: Use caution when releasing tool pressure on the rear clutch piston spring. Failure to follow these instructions may result in personal injury.

CAUTION: Do not fully compress the special tool or damage to the spring retainer may occur.

Using the special tool, remove the coast clutch piston retaining ring.

Item 8: Direct and Overdrive Clutch Piston Disassembly Note





1. WARNING: Air pressure must not exceed 138 kPa (20 psi). Wear safety glasses when using compressed air, and make sure the drum is facing down as shown. Failure to follow these instructions may result in personal injury.

Remove the coast clutch piston.
^ Apply air pressure to the hole in the drum to remove the coast clutch piston while blocking the other hole with a finger.

Item 11: Overdrive Brake and Coast Clutch Drum Assembly Note





1. Verify the check ball is free to move.

Items 9 and 10: Direct and Overdrive Piston Inner and Outer Seal Ring Assembly Note





1. CAUTION: The lip seals must be positioned as shown. Care must be taken to prevent rollover of the lip seal.

Install the new coast clutch piston inner and outer seal.

Item 8: Direct and Overdrive Clutch Piston Assembly Note





1. CAUTION: Care must be taken to prevent damage to the seals during installation.

Lubricate the seals, then using the special tool, install the coast clutch piston.

Item 5: Retaining Ring Assembly Note





1. CAUTION: Do not fully compress the special tool or damage to the coast clutch piston spring retainer may occur.

Using the special tool, install the coast clutch piston spring retainer ring

Items 3 and 4: Coast (clutch External Steel and Internal Friction Plates Assembly Note





1. CAUTION: Coast clutch friction plates are directional and must be installed with grooves clockwise (I.D. to O.D.). The word "TOP" should face up.

CAUTION: If new clutch plates are being used, they should be soaked in clean automatic transmission Hold for at least 30 minutes before assembly.

When installing friction plates, the word "TOP" should face up. If reusing plates grooves must be installed clockwise Install the coast clutch disc pack





2. Install the two steel clutch plates and two friction clutch plates in an alternating order, starting with a steel clutch plate.

Item 1: Retaining Ring Assembly Note





1. WARNING: Air pressure must not exceed 138 kPa (20 psi). Wear safety glasses when using compressed air, and make sure drum is facing down as shown. Failure to follow these instructions may result in personal injury.

Air check the assembly.
^ Apply air pressure to the hole in the drum while blocking the other hole with a finger to make sure that a correct piston seal has been established.








2. Check the coast clutch disc pack free play.
1 Push down on the coast pressure plate.
2 Check clearance between the coast clutch retaining ring and coast pressure plate. Clearance should be 1.3 - 2.0 mm (0.051 - 0.079 inch). If clearance is not within the specification, install a correct coast clutch retaining ring that will provide the correct free play adjustment.