If the clutch was slipping the rpm would increase when you give it gas, not stall. Have not experienced what you are describing but I have had clutch slip before and it doesn't sound like a clutch. How many miles on the jeep?
4" Teraflex long arm lift. D30 tubed with chromoly axles, high pinion, powertrax no-slip and Warn Lockout Hubs. D35 w/ultimate 35 upgrade OX locker, 4.56 gears. NP231HD, Air on Board, Warn M8000 Winch.