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Countershaft Inspection

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  1. Inspect the oil passage, gear, and bearing contact areas for wear and damage, then measure the countershaft at points A, B, C, and D. If any part of the countershaft is less than the service limit, replace it.

    Standard: 

    1. Ball Bearing Contact Area (Transmission Housing Side): 30.002- 30.015 mm (1.18118- 1.18169 in) 
    2. 2nd Gear Distance Collar Contact Area: 42.975- 42.991 mm (1.69193- 1.69256 in) 
    3. Countershaft Reverse Gear Contact Area: 45.934- 45.950 mm (1.80842- 1.80905 in) 
    4. Needle Bearing Contact Area (Clutch Housing Side): 43.974- 43.990 mm (1.73126- 1.73189 in) 

    Service Limit: 

    1. 29.95 mm (1.1791 in) 
    2. 42.92 mm (1.6898 in) 
    3. 45.88 mm (1.8063 in) 
    4. 43.92 mm (1.7291 in) 
      Fig 1: Identifying Countershaft Contact Areas
      G08066122Courtesy of AMERICAN HONDA MOTOR CO., INC.
  2. Inspect the runout by supporting both ends of the countershaft. Then rotate the countershaft two complete turns while measuring with a dial gauge. If the runout exceeds the service limit, replace the countershaft.

    Standard: 0.02 mm (0.0008 in) max. 

    Service Limit: 0.05 mm (0.0020 in) 

    Fig 2: Measuring Runout Of Countershaft Using Dial Gauge
    G08066123Courtesy of AMERICAN HONDA MOTOR CO., INC.