Forward Clutch: Reassembly
- Install inner and outer piston seals and cushion spring. Coat piston components and seal with petroleum jelly. Using inner and outer Seal Lip Protectors (T74P-77548-A and T74P-77548-B) install clutch piston into body. Remove seal lip protectors. Install compression springs and spring retainer. Compress springs and install retaining snap ring. Carefully remove spring compressor.
- Ensure cushion is installed between steel clutch plate and piston. See Fig 1
. Install a steel plate and then a friction plate. Alternately install remaining discs in clutch pack. Number of clutch discs varies with engine size. Install same number of discs as removed. Install pressure plate and secure pack with retaining snap ring.
- While pushing down on clutch pack, use a feeler gauge to check clearance between retaining snap ring and pressure plate. If clearance is not .055-.083" (1.4-2.1 mm), install correct thickness retaining snap ring.
- Retaining snap rings are available in the following thicknesses: .054" (1.37 mm), .068" (1.73 mm), .082" (2.08 mm) and .096" (2.44 mm). Once correct retaining snap ring is installed, recheck clearance.
- Install forward clutch cylinder seal rings, ensure seal rings are interlocked and ring gaps 180 degrees apart. Install center support on forward clutch cylinder. Apply air pressure to left side (middle-sized) port. See Figure
. Piston must apply under pressure and release when air is removed.
Courtesy of FORD MOTOR CO.