Hard to shift into the 6th gear

Probable cause(s)
  1. 6th synchro ring defective.
  2. 5th/6th synchro sleeve defective.
  3. 6th gear defective.
Notes
  • Check the 6th synchro ring.
  • Check the 5th/6th synchro sleeve and hub.
  • Check 6th gear.