3-4 Clutch: Disassembly

Remove the 3-4 clutch hub assembly.
1. Remove the hub.
2. Remove the bearing.
  
  Fig 1: Removing 3-4 Clutch Hub Assembly
  Courtesy of FORD MOTOR CO.
Remove the oil seals from the 3-4 clutch drum and input shaft.

Fig 2: Removing Oil Seals From 3-4 Clutch Drum And Input Shaft
Courtesy of FORD MOTOR CO.
Remove the 3-4 clutch pack snap ring.

Fig 3: Removing 3-4 Clutch Pack Snap Ring
Courtesy of FORD MOTOR CO.
Remove the 3-4 clutch pack.

Fig 4: Removing 3-4 Clutch Pack
Courtesy of FORD MOTOR CO.
Remove the 3-4 clutch piston snap ring.
1. Using the special tool, compress the clutch piston.
2. Remove the snap ring.
  
  Fig 5: Removing 3-4 Clutch Piston Snap Ring
  Courtesy of FORD MOTOR CO.
Remove the 3-4 clutch piston spring retainer assembly.
1. Remove the spring retainer.
2. Remove the springs.
  
  Fig 6: Removing 3-4 Clutch Piston Spring Retainer Assembly
  Courtesy of FORD MOTOR CO.

NOTE: Block off the opposite side of the indicated port.

Remove the 3-4 clutch piston.
- Apply compressed air to the port to remove the piston.
  
  Fig 7: Removing 3-4 Clutch Piston
  Courtesy of FORD MOTOR CO.
Remove the seals from the 3-4 clutch piston.

Fig 8: Removing Seals From 3-4 Clutch Piston
Courtesy of FORD MOTOR CO.

NOTE: The 3-4 clutch piston springs and spring retainer must be replaced as an assembly.

Inspect the 3-4 clutch and input shaft assembly components for wear or damage. Replace as necessary.
Measure the thickness of the 3-4 clutch plate facings. A new clutch plate facing will be 1.6 mm (0.063 in) thick. If any of the facings are less than 1.4 mm (0.055 in) thick, replace all of the 3-4 clutch plate facings.

Fig 9: Measuring Thickness Of 3-4 Clutch Plate Facings
Courtesy of FORD MOTOR CO.
Verify proper check ball operation.
- Apply compressed air to the check ball hole opposite the return spring side. No air should leak past the check ball. If air leaks past the check ball, install a new 3-4 clutch piston.
  
  Fig 10: Locating Check Ball (1 Of 2)
  Courtesy of FORD MOTOR CO.
Verify proper check ball operation.
- Apply compressed air to the check ball oil hole on the return spring side. Air should leak past the check ball. If no air leaks past the check ball, install a new 3-4 clutch piston.
  
  Fig 11: Locating Check Ball (2 Of 2)
  Courtesy of FORD MOTOR CO.
Install new oil seals on the 3-4 clutch drum and input shaft.

Fig 12: Installing Oil Seals On 3-4 Clutch Drum And Input Shaft
Courtesy of FORD MOTOR CO.
Check the seal side clearance. The clearance should be 0.08 mm (0.0031 in) to 0.23 mm (0.0091 in). If the clearance is above specification, install a new 3-4 clutch drum and input shaft.

Fig 13: Checking Seal Side Clearance
Courtesy of FORD MOTOR CO.