For easy shifting of gears, it is necessary to regularly lubricate the gear linkages. Slackness must be inspected and adjusted otherwise it may cause either hard gear engagement or gear slips out of mesh. To avoid this problem, the alignment of following parts to be checked and adjusted.

 a) Gear lever with gear rod excessive play is adjusted by using thrust washer, by adding thrust washer in the gear lever casing. 

b) Check the gear rod spring and lever ball for wear. 

c) Gear shifter fork should align with the shifting sleeve on the main shaft of respective gear. If alignment is improper, loosen the fork bolt and adjust. 

d) Check the synchronizing ring with the synchronizing cone and with fixed hub mounting on the main shaft. 

e) Inspect the internal and gear teeth for nick formation, polish the same for solving the problem.

f) In case of Motor cycle, tighter the gear shifter lever, if it has slackened. 

After the necessary adjustments go for driving test. All the gears should be engaged and dis engaged smoothly with smooth transmission of power.