Dominic Tomasello

My son bought his 2000 wrangler with a 5 speed and it has 80000 miles on it. The problem is that after a long ride from NJ to NH it has a mild but consistent grind from 4 the to 5 the gear. The clutch disengagement is high with very little play on top. Question is do I have to replace transmission with clutch change. Also any possibility that the slave cylinder is involved and needs replacement