overheating jeep

i have a 93 jeep with a 5spd. 4cyl. when im driving down the road and go to shift into 5th gear it doesnt o anywhere. ive taken it to the shop 2 differnt times and had it fixed. and now its done it again. so ive just been driving it with 4 gears. now its stated overheating...temp guage goes up in red. i was thinking maybe its a result of driving it at high rpms?. any help?? thanks

How high do the RPM's go when you are driving it?

It sounds like maybe your clutch is slipping. Classis problem noticed when you shift into 5th and the clutch is worn out. So you engage the tranny into 5th with out any problem, hit the gas and your rpms tach up and you go nowhere? Thats a clutch issue, recommend entire kit, and don't forget about the pilot bearing.Very important to the life of your tranny.