Coast Clutch

DISASSEMBLE

Exploded View Of Coast (overdrive) Clutch:

1. Remove pressure plate retainer ring, then the plate pack.
2. Inspect steel clutch plates and clutch lining plates for wear, damage, or effects of overheating, replacing entire set if necessary.

NOTE: If new plates are to be used, immerse them in transmission fluid for 30 minutes before assembly.

Clutch Spring And Compression Spring Retainer Replacement:

3. Using clutch spring compressor tool No. T65L-77515-A or equivalent, compress clutch compression springs, remove retaining ring, and carefully release pressure on spring, then remove spring and compression spring retainer.

Removing Reverse/High Clutch Piston Or Air Testing Assembled Reverse/High Clutch:

4. Apply no more than 20 psi air pressure to blow out clutch piston as shown in the Removing Coast (Overdrive) Clutch Piston Or Air Testing Assembled Overdrive Clutch image, using finger to close off opposite hole.

ASSEMBLE
1. Install new seal rings on clutch piston.
2. Carefully install clutch piston into clutch body.
3. Install compression spring and spring retainer, compress springs using clutch spring compressor and install retaining ring, as shown in the Clutch Spring And Compression Spring Retainer Replacement image.
4. Install clutch plates beginning with a steel plate, then alternate friction, steel, friction, and install pressure plate and retaining clip.
5. Using feeler gauge, check clearance between retaining ring and pressure plate, pushing downward on plates while checking clearance.
6. If clearance is not 0.039-0.067 inch install corrective selective retaining ring. Retaining rings are available in thicknesses of 0.0539, 0.0681, 0.0819 and 0.0961 inch.
7. Block hole with finger to prevent air leakage and ensure piston applies when pressurized and releases when air is removed, as shown in the Removing Coast (Overdrive) Clutch Piston Or Air Testing Assembled Overdrive Clutch image.