4×4 high and low work great on land but noticed a clunking noise when letting off the gas and seems to be in front axle to diff. went to play in the swamp and 4×4 high wouldn’t work, but 4×4 low did? i was in water up past the foot wells. when i got it out of the swamp and water to land 4high worked again? its a 2104 570 AWD on the fly. has about 330 hours. i know these to make clicking or clunking noises from my understanding but why would 4high not work and 4 low does in that situation? belt slipping? any help would be great ! thanks TK