Inspect the gear and bearing contact areas 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.

A Ball Bearing Contact Area (Transmission   Housing Side):
	30.020−30.033 mm (1.1819−1.1824 in.)
B Distance Collar Contact Area:
	39.937−39.950 mm (1.5723−1.5728 in.)
C Needle Bearing Contact Area (Clutch Housing   Side):
	R20A3 Engine Model:
	40.000−40.015 mm (1.5748−1.5754 in.)
	K24Z3 Engine Model:
	35.000−35.015 mm (1.3780−1.3785 in.)
Service Limit:
A:	29.97 mm (1.180 in.)
B:	39.883 mm (1.5702 in.)
C:	R20A3 Engine Model:
	39.95 mm (1.573 in.)
	K24Z3 Engine Model:
	34.95 mm (1.376 in.)

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 is more than the service limit, replace the countershaft.

Standard:	0.02 mm (0.001 in.) max.
Service Limit:	0.05 mm (0.002 in.)