GM Firebird 1967-1981 Repair Guide

Driven Disc and Pressure Plate

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REMOVAL & INSTALLATION



See Figures 1 through 18

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Fig. Fig. 1: Exploded view of a common clutch assembly



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Fig. Fig. 2: Typical clutch alignment tool, note how the splines match the transmission's input shaft



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Fig. Fig. 3: Loosen and remove the clutch and pressure plate bolts evenly, a little at a time ...



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Fig. Fig. 4: ... then carefully remove the clutch and pressure plate assembly from the flywheel



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Fig. Fig. 5: Check across the flywheel surface, it should be flat



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Fig. Fig. 6: If necessary, lock the flywheel in place and remove the retaining bolts ...



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Fig. Fig. 7: ... then remove the flywheel from the crankshaft in order replace it or have it machined



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Fig. Fig. 8: Upon installation, it is usually a good idea to apply a thread-locking compound to the flywheel bolts



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Fig. Fig. 9: Check the pressure plate for excessive wear



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Fig. Fig. 10: Be sure that the flywheel surface is clean, before installing the clutch



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Fig. Fig. 11: Clutch release bearing lubrication points the top bearing is a flat finger type and the bottom one is a bent finger type



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Fig. Fig. 12: Install a clutch alignment arbor, to align the clutch assembly during installation



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Fig. Fig. 13: Clutch plate installed with the arbor in place



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Fig. Fig. 14: Clutch plate and pressure plate installed with the alignment arbor in place



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Fig. Fig. 15: Pressure plate-to-flywheel bolt holes should align



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Fig. Fig. 16: You may want to use a thread locking compound on the clutch assembly bolts



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Fig. Fig. 17: Install the clutch assembly bolts and tighten in steps, using an X pattern



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Fig. Fig. 18: Be sure to use a torque wrench to tighten all bolts

  1. Support the engine and remove the transmission.
  2.  
  3. Disconnect the clutch fork pushrod and spring.
  4.  
  5. Remove the flywheel housing.
  6.  
  7. Slide the clutch fork from the ball stud and remove the fork from the dust boot. The ball stud is threaded into the clutch housing and may be replaced, if necessary.
  8.  
  9. Install an alignment tool to support the clutch assembly during removal. Mark the flywheel and clutch cover for reinstallation, if they are not already matchmarked.
  10.  
  11. Loosen the clutch-to-flywheel attaching bolts evenly, one turn at a time, until spring pressure is released. Remove the bolts and clutch assembly.
  12.  
  13. Clean the pressure plate and flywheel face.
  14.  
  15. Support the clutch disc and pressure plate with an alignment tool. The driven disc is installed with the damper springs on the transmission side. On some 1967 6-cylinder engines, the clutch disc is installed in a reverse manner with the damper springs to the flywheel side.
  16.  
  17. Turn the clutch assembly until the mark on the cover lines up with the mark on the flywheel, then install the bolts. Tighten them down evenly and gradually to avoid distortion.
  18.  
  19. Remove the alignment tool.
  20.  
  21. Lubricate the ball socket and fork fingers at the release bearing end with high melting-point grease. Lubricate the recess on the inside of the throwout bearing and fork groove with a light coat of graphite grease.
  22.  
  23. Install the clutch fork and dust boot into the housing. Install the throwout bearing to the fork. Install the flywheel housing. Install the transmission.
  24.  
  25. Connect the fork pushrod and spring. Lubricate the spring and pushrod ends.
  26.  
  27. Adjust the shift linkage and clutch pedal free-play.
  28.  

 
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