Fluid Pump
Fluid Pump
Special Tool(s)
Disassembly
1. Remove the fluid pump gasket, fluid pump seal ring, and the No. 1 thrust washer.
1 Remove and discard the fluid pump gasket.
2 Remove and discard the fluid pump seal ring (square cut).
3 Remove and tag the No.1 thrust washer.
2. Remove the fluid pump support seal ring.
3. Remove the seal rings.
4. Remove the fluid pump housing.
5. NOTE: A rough casting on the pump surface crescent is not a flaw.
NOTE: The fluid pump gears are part of the pump assembly and are not repaired separately.
Remove the fluid pump gears.
6. Remove the drive gear O-ring seal and discard. Inspect the fluid pump gears for cracks and scoring.
7. Inspect the overdrive pump.
^ Inspect the overdrive pump support gear pockets for scoring and wear.
^ Clean and inspect the overdrive and rear input shaft bushings.
8. Inspect the fluid pump adapter plate for scoring and wear.
9. Remove the valve.
10. Inspect the fluid pump to converter housing bushing.
Assembly
1. NOTE: Minor burrs and scoring may be removed with crocus cloth. If damage is found, install a new assembly.
Inspect the fluid pump components for the following:
^ Pump body and case for burrs.
^ Fluid passages for obstructions.
2. NOTE: Check and make sure that the garter spring in the seal has not popped off of the converter hub seal.
Install a new seal onto the special tool.
3. Using the special tool, install the converter hub seal.
4. Install a new O-ring seal in fluid pump drive gear.
5. CAUTION: Lubricate the special tool with multi-purpose grease.
Using the special tool, seat the O-ring seal in the pump gear.
6. CAUTION: The chamber on the inside edge of the small gear must be up when in the pump housing gear pocket. The dimple on the larger gear must be down when in the pump housing gear pocket.
Install the pump gears into the fluid pump housing. Apply multi-purpose grease to pump gear to prevent scoring at start-up.
7. Install a new seal on the valve.
8. Install the valve.
9. First install the fluid pump adapter plate and then the alignment pins in their correct locations.
10. CAUTION: The special tools must be used to correctly align the pump with the adapter plate to reduce gear noise, bushing failure and leakage.
Using the special tool, align the fluid pump to the adapter plate.
11. Using the special tools, assemble the pump.
12. Loosely install the fluid pump housing screws in their correct locations and remove the special tools.
13. Install the two remaining screws.
14. Tighten all of the fluid pump screws in a star pattern.
15. Install a new fluid pump seal ring.
16. CAUTION: Verify correct seal installation. Make sure seal grooves are clean and free of burrs.
Install the seal.
Overdrive Brake and Coast Clutch Drum Assembly
Special Tool(s)
Materials
Overdrive Brake and Coast Clutch Drum Assembly
Disassembly
1. Remove the coast clutch pressure plate.
1 Remove the coast clutch retaining ring.
2 Remove the coast clutch pressure plate.
2. Remove the coast clutch disc pack.
^ Inspect for wear, install a new pack as necessary.
3. 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.
4. Relieve the coast clutch spring tension and remove the special tool.
5. Remove the coast clutch piston springs.
1 Remove the coast clutch piston retainer.
2 Remove the clutch piston springs.
6. 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.
7. Remove the coast clutch piston inner seal and the coast clutch piston outer seal.
^ Clean and install a new seal as necessary.
Assembly
1. 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.
2. 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.
3. Verify the check ball is free to move.
4. CAUTION: Care must be taken to prevent damage to the seals during installation.
Using the special tool, install the coast clutch piston.
5. Install the coast clutch piston springs.
1 Install the coast clutch piston springs.
2 Install the coast clutch spring retainer.
6. 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.
7. 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 fluid 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.
8. Install the two steel clutch plates and two friction clutch plates in alternating order starting with a steel clutch plate.
9. CAUTION: The retaining ring is select fit.
Install the coast clutch pressure plate.
1 Install the coast clutch pressure plate.
2 Install the original coast clutch retaining ring.
10. 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.
11. 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.