Assembly Note

Assembly Note

Caution: The lip seals must be positioned as shown. Care must be taken to prevent roll over of the lip seal.
1. Install the new coast clutch piston inner and outer seal.





Caution: Lubricate the coast clutch piston inner and outer seal.

2. Install the coast clutch piston into Coast Clutch Outer Seal Sizing Tool SST 307-353.





3. Inspect the coast clutch components for damage or wear. Replace as necessary.
1) Inspect the drum band surface, bushing, and thrust surfaces for scores. Minor scores may be removed with a crocus cloth. Badly scored parts must be replaced.
2) Inspect the clutch piston bore and the clutch piston and the piston inner and outer bearing surfaces for scores.
3) Check the fluid passages for obstructions. All fluid passages must be clean and free of obstructions.
4) Inspect the clutch plates for wear, scoring and fit on the clutch hub serrations. Replace all plates that are badly scored, worn or do not fit freely in the hub serrations.
5) Inspect the clutch pressure plate for scores on the clutch plate surface. Check the clutch release spring(s) for distortion.
4. Verify the check ball in the front/overdrive band brake and coast clutch drum is free to move clear of debris.





5. Carefully remove the coast clutch piston from Coast Clutch Outer Seal Sizing Tool SST 307-353.





Caution: Care must betaken to prevent damage to the seals during installation.

6. Install the coast clutch piston into the front/overdrive band brake and coast clutch drum.





7. Install the coast clutch piston springs.
1) Install the twenty (20) coast clutch piston springs.
2) Position the coast clutch piston spring retainer.





Caution: Do not fully compress Clutch Spring Compressor SST 49 G019 025 or damage to the coast clutch piston spring retainer may occur.

8. Install the coast clutch piston spring snap ring.
1) Use Clutch Spring Compressor SST 49 G019 025 to compress the coast clutch piston springs.
2) Install the coast clutch piston snap ring.





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

9. Relieve the coast clutch spring tension and remove Clutch Spring Compressor SST 49 G019 025.
10. When installing friction plates, the word "TOP" should face up. If reusing plates, grooves must be installed clockwise. Install the coast clutch disc pack.





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





Caution: The retaining ring is select fit.

12. Install the coast clutch pressure plate.
1) Install the clutch pressure plate.
2) Install the original coast clutch snap ring.





Warning: Air pressure must not exceed 138 kPa (20 psi). Wear safety glasses when using compressed air. Make sure drum is facing down as shown.

13. Air check the assembly.
1) Apply air pressure to the hole in the drum while blocking the other hole with a finger.





Note: The coast clutch piston is applied with air pressure and released when the air is removed.

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