Manual:HUMMER Hummer H3 Base 2010Page:20399 / 37523



Gears and Shafts Cleaning and Inspection: Countershaft — 2010 Hummer H3 Base, Automatic Service Manual

Gears and Shafts Cleaning and Inspection: Countershaft

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Inspection Areas On Countershaft
    GM881084Courtesy of GENERAL MOTORS CORP.
  1. Clean the countershaft in a suitable solvent and air dry all the parts.
  2. Inspect the rear bearing race (1) on the countershaft for the following conditions:
    • Brinelling
    • Wear
    • Scoring
  3. Inspect the 5th countershaft gear bearing race (2) for the following conditions:
    • Brinelling
    • Wear
    • Scoring
    4. Fig 2: Checking Radial Clearance For 5th Countershaft Gear
    GM881117Courtesy of GENERAL MOTORS CORP.
  4. Measure the radial clearance for 5th countershaft gear.
    1. Place the 5th countershaft gear, with the needle roller bearing, on the countershaft journal.
    2. Use J 8001-3  or J 26900-12  (1) and J 26900-13  (2). See Special Tools .
    3. Position J 8001-3  or J 26900-12  on the gear. See Special Tools .
    4. Move the gear up and down.

      Specification: 

      • Standard Clearance: 0.015-0.068 mm (0.0006-0.0027 in)
      • Maximum Clearance: 0.160 mm (0.0063 in)
  5. If the clearance exceeds the maximum, replace the gear, the roller bearing, or the countershaft.
    6. Fig 3: Measuring Outer Diameter Of Countershaft Journal
    GM881118Courtesy of GENERAL MOTORS CORP.
  6. Using a micrometer, measure the outer diameter of the countershaft journal.

    Specification:  Minimum diameter: 29.860 mm (1.1756 in)

  7. Inspect all of the countershaft gears for being faulty following the gear inspection steps.
  8. Replace the countershaft if it is faulty.