Automotive Clutch Troubleshooting Diagnostic Guide - Clutch Chatters and Grabs

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Clutch Trouble Diagnosis

The following information is provided to assist you in recognition of the problem based on your clutch performance symptoms, correct diagnostics eliminates solving problem(s) that you may or may not have:

Clutch Chatters and Grabs:

 

1. Improper pedal adjustment

2. Improperly adjusted cover assembly

3. Bent or warped clutch cover

4. Worn pilot bearing or bushing

5. Dry or poorly lubricated pilot bearing

6. Dust, grease, oil or foreign matter in clutch

7. Gummy, glazed or worn clutch facings

8. Unequal spring pressure

9. Release levers binding

10. High spot on pressure plate

11. Flywheel not resurfaced at installation

12. Insufficient cushion in sprints or stamping of clutch plate

13. Broken, cracked, grooved or warped pressure plate

14. Heat flattened cushion springs

15. Flexible center or hub springs broken, weak or worn

16. Bent clutch plate due to installation error

17. Burrs on clutch plate splines

18. Bent main drive gear

19. Misalignment of clutch and transmission

20. Bell housing misalignment

21. Hill holder unit incorrectly adjusted

22. Loose or worn universal joints

23. Loose U-joint companion flange

24. Propeller shaft and U-joints misaligned

25. Excessive end play in rear spring shackles

26. Excessive backlash in U-joints or rear axle

27. Loose bell housing bolts

28. Loose or worn axle shaft splines

29. Loose flywheel to crankshaft bolts

30. Loose rear spring saddles

31. Loose rear spring U-bolts

32. Loose or worn engine and transmission mountings

33. Worn clutch fork

34. Worn throwout bearing

35. Throwout bearing carrier binding or cocked on sleeve

36. Heat-set diaphragm spring

37. Weak retractor springs used on diaphragm spring assemblies

38. Burrs on main drive gear splines

39. Dirt, burrs or nicks between flywheel and crankshaft flange

40. Worn torque shaft bushings

41. Loose motor support rods

42. Wrong type of facing used

 

Other possible clutch problems:

 

Clutch Squeaks

 

Grease or Oil on Facings

Clutch Drags

 

Clutch Vibration

 

Failure to Transmit Power

Clutch Noise

 

Clutch Pedal Vibration

 

Premature Clutch Facing Wear

Clutch Rattles

 

Clutch Wear Indications

 

Uneven Main Drive Gear Spline Wear

Clutch Slips

 

Clutch Hub Pulled out of Plate

 

 


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