Escalade, Suburban, Tahoe, Yukon, Denali, DenaliXL, YukonXL 1999-2005

Flywheel or Flexplate & Ring Gear

Print

Removal & Installation



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

  1. Remove the transmission.
  2.  
  3. Remove the six bolts attaching the flywheel to the crankshaft flange. Remove the flywheel.
  4.  

To install:

  1. 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.
  2.  
  3. If equipped with a manual transmission inspect the pilot bearing and replace if necessary.
  4.  
  5. If equipped with a spacer between the crankshaft and flywheel, reinstall the spacer.
  6.  
  7. Install the flywheel. The flywheel will only attach to the crankshaft in one position, as the bolt holes are unevenly spaced. Install the bolts and tighten in a criss-cross pattern. Refer to the Torque Specifications chart in this section, under Specification Charts for the proper tightening torques.
  8.  

4.8L, 5.3L, 6.0L & 8.1L Engines
  1. Remove the transmission.
    NOTE
    Note the position and direction of the engine flywheel before removal.

  2.  
  3. Remove the flywheel bolts.
  4.  
  5. Remove the flywheel.
  6.  
  7. Install two M11x1.5 mm bolts (1) to the threaded holes of the spacer, if applicable.
  8.  
  9. Rotate the bolts clockwise to remove the spacer.
  10.  
  11. Remove the spacer from the rear of the crankshaft, if applicable.

    Click image to see an enlarged view

    Fig. Certain applications will use a spacer between the flywheel and the crankshaft.

  12.  

To install:


NOTE
The flywheel does not use a locating pin for alignment and will not initially seat against the crankshaft flange or spacer, if applicable, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a three stage tightening process. Certain applications (6.0L) require a spacer and longer bolts for proper flywheel position.

  1. Install the spacer, if applicable, onto the rear of the crankshaft.
  2.  
  3. Install the flywheel and bolts to the crankshaft.
    NOTE
    "Engine Side" stamped on the flywheel is to be positioned toward the engine.

  4.  
  5. Apply threadlock GM P/N 12345382, (Canadian  P/N 10953489) or equivalent to the threads of the flywheel bolts.

    Click image to see an enlarged view

    Fig. Tightening sequence of flywheel bolts-4.8L, 5.3L, 6.0L and 8.1L Engines

  6.  
  7. Tighten the flywheel bolts in sequence in the following manner:

    Tighten the bolts a first pass to 15 ft. lbs. (20 Nm).
     
    Tighten the bolts a second pass to 37 ft. lbs. (50 Nm).
     
    Tighten the bolts a final pass to 74 ft. lbs. (100 Nm).
     

  8.  
  9. Install the transmission.
  10.  

5.7L, 6.5L & 7.4L Engines

NOTE
If replacing the manual transmission type engine flywheel, note the location of any existing flywheel weights (if applicable). Install new flywheel weights into the new engine flywheel (if applicable). Flywheel weights must be installed into the new engine flywheel in the same location as the old flywheel weights in the old engine flywheel. A properly installed flywheel weight will be either flush or below flush with the face of the engine flywheel.

  1. Note the position and location of the flywheel weights (if applicable).

    Click image to see an enlarged view

    Fig. Note location of any flywheel weights!

  2.  
  3. Remove the engine flywheel bolts.
  4.  
  5. Remove the engine flywheel.
  6.  

To install:

Click image to see an enlarged view

Fig. Be certain to replace retainers (if equipped).



Click image to see an enlarged view

Fig. Tightening sequence of flywheel bolts-5.7L, 6.5L and 7.4L Engines

  1. Install the inner retainer (if equipped).
  2.  
  3. Install the engine flywheel. Align the engine flywheel locator hole to the flywheel locator pin.
  4.  
  5. Install the outer retainer (if equipped).
  6.  
  7. Install the engine flywheel bolts and tighten in sequence to 74 ft. lbs. (100 Nm) for 5.7L engines and 66 ft. lbs. (90 Nm) for 7.4L engines.
  8.  

 
label.common.footer.alt.autozoneLogo