Fifth gear gear

Sa friends, I started to sing red 306 clutch ball from Eskişehir. The gearbox will come down. editDate> 2013-02-23 17:58:24

Guys, is there anyone replacing the fifth gear with a bigger one? When I started to accelerate when I was in fifth gear, there was a buzz in the clutch ball, the buzz was coming by the gearbox. otherwise I do not know the axle definition, I am waiting for your comments and help