GM Cutlass RWD 1970-1987 Repair Guide

Flywheel or Ring Gear

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REMOVAL & INSTALLATION



See Figure 1

Manual Transmission
  1. Remove transmission and clutch assembly, being certain to mark clutch cover and flywheel so clutch may be reinstalled in original position. (See Drive Train for transmission removal.)
  2.  
  3. Remove flywheel. Flywheel is attached by unevenly spaced bolts.
  4.  
  5. If ring gear is to be replaced, drill a hole between two teeth and split gear with a cold chisel.
  6.  
  7. Heat and shrink a new gear in place as follows:
    1. Polish several spots on ring with emery cloth.
    2.  
    3. Use a hot plate or slowly moving torch to heat the ring until the polished spots turn blue (approximately 600° f ) Heating the ring in excess of (800° F) will destroy the heat treatment.
    4.  
    5. Quickly place ring in position against shoulder of flywheel with chamfered inner shoulder of flywheel with chamfered inner edge of ring gear toward flywheel shoulder. Allow ring to cool slowly until it contracts and is firmly held in place.
    6.  

  8.  
  9. Make certain the flywheel and crankshaft flange are free from burrs that would cause run-out. Install flywheel.
  10.  

Automatic Transmission
  1. Remove transmission (refer to Drive Train ).
  2.  
  3. Remove six bolts attaching flywheel to crankshaft flange.
  4.  
  5. Inspect flywheel; if cracked, badly worn or it has broken teeth, replace flywheel.
  6.  
  7. Inspect crankshaft flange and flywheel for burrs. Remove any burrs with a mill file.
  8.  
  9. Install flywheel. Bolt holes are unevenly spaced so all flywheel bolts can be installed with flywheel in correct position. Install bolts and torque to specifications.
  10.  
  11. Mount dial indicator on engine block and check flywheel run-out at three attaching bosses. Run-out should not exceed 0.015 in.(0.381mm). The crankshaft end-play must be held in one direction during this check.
  12.  
  13. If run-out exceeds 0.015 in. (0.381mm), attempt to correct by tapping high side with mallet. If this does not correct, remove flywheel and check for burrs between flywheel and crankshaft mounting flange.
  14.  



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Fig. Fig. 1: Flywheel installation

 
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