1. Inspect the gear surface and bearing surface for wear and damage, then measure the countershaft at points A, B, and C. If any part of the countershaft is less than the service limit, replace it with a new one.
   Standard:

   A Ball Bearing Surface (Transmission Housing Side):
   | 30.020−30.033 mm (1.1819−1.1824 in.)
   B Distance Collar Surface:
   | 39.937−39.950 mm (1.5723−1.5728 in.)
   C Needle Bearing Surface (Clutch Housing Side):
   | 5-speed model: 35.000−35.015 mm (1.3779−1.3785 in.) 6-speed model: 40.000−40.015 mm (1.5748−1.5754 in.)

   Service Limit:
   A: | 29.97 mm (1.180 in.)
   B: | 39.883 mm (1.5702 in.)
   C: | 5-speed model: 34.95 mm (1.376 in.) 6-speed model: 39.95 mm (1.573 in.)