M/T Countershaft Inspection

1.Inspect the gear and bearing surfaces 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 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): 
 40.000-40.015 mm (1.5748-1.5754 in.) 

Service Limit: 
A: 29.97 mm (1.180 in.) 
B: 39.88 mm (1.570 in.) 
C: 39.95 mm (1.573 in.) 


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