2011 Arctic Cat DVX 300 / 300 Utility ATV Service Manual, Page 53Get this manual
14Install the shift shaft making sure to align the timing mark between the two marks on the shift cam
17Use center punch to stake the nut to the driveshaft18Apply clean engine oil to new O-ring and install in the groove of the secondary driven bevel gear housing; then with the index marks aligned, install the secondary driven bevel gear assembly in the transmission case