Why would a 1987 Jeep Cherokee with a manual transmission shift into gear but only move in third gear?

MY FIRST guess would be that the pressure plate and the clutch itself may be cooked. If when you have it in 3rd geart and it moves, but if you give it a lot of gas and it seems to "slip", not having enough power, then I would say that your pressure plate is fried. GOOD LUCK! >>