GM Bonneville/Eighty Eight/LeSabre 1986-1999

Flywheel and Ring Gear

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REMOVAL & INSTALLATION



The ring gear is an integral part of the flywheel and is not replaceable.

  1. Remove the transaxle from the vehicle, as outlined in Drive Train of this repair guide.
  2.  
  3. Mark the flywheel to the crankshaft for identification during replacement.
  4.  
  5. Unfasten the bolts attaching the flywheel to the crankshaft flange, then remove the flywheel.
  6.  
  7. Inspect the flywheel for cracks, and inspect the ring gear for burrs or worn teeth. Replace the flywheel if any damage is apparent. Remove burrs with a mill file.
  8.  

To install:
  1. Install the flywheel. Most flywheels will only attach to the crankshaft in one position, as the bolt holes are unevenly spaced, but use your marks as a guide.
  2.  
  3. Install the retaining bolts and tighten to the following specifications:
    1. 1987-91 vehicles: 61 ft. lbs. (82 Nm).
    2.  
    3. 1992-94 vehicles: 11 ft. lbs. (15 Nm), plus an additional 50° rotation.
    4.  
    5. 1995-99 vehicles, except 1995 3.8L (VIN K and 1) engine: 11 ft. lbs. (15 Nm), plus an additional 50° rotation.
    6.  
    7. 1995 3.8L (VIN K and 1) engine: 46 ft. lbs. (62 Nm).
    8.  

  4.  
  5. Mount a suitable dial indicator on the engine block, then check the flywheel run-out at the three attaching bosses. The crankshaft end-play must be held in one direction during this check. Run-out should not exceed 0.015 in. (0.381mm).
  6.  
  7. If the run-out exceeds 0.015 in. (0.381mm), try to correct by lightly tapping the high side with a rubber mallet.
  8.  
  9. If the condition cannot be corrected, the flywheel must be replaced.
  10.  

 
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