I went to use four wheel drive I moved slowly two feet and I heard a clunk clunk

i got stuck this winter and when i went to use four wheel drive i moved slowly two feet and i heard a clunk clunk but i got out of the spot i was stuck in i used it only one other time and now when i drive in 2wd i hear a clicking noise coming from the transfer case. I also noticed that it wont shift into 2wd so what i did is jacked up my driver side both tires and i put the truck into four wheel drive and when i let off the brake and idle it the two wheels on driver side moved when i put my brakes on i heard a clank noise coming from the transfer case almost like a grinding clank skip sound. So i got under the truck and checked the front drive shaft coming from the transfer case i moved it brake and forth and noticed that the sound of a click or slight clank came from it when i moved it back and forth. So any ideas or help in this matter would be greatly appreciated Thanks,,