I went riding this past weekend and I went into a deep water hole so I backed up when I realized how deep it was , I had to give her alittle throttle and I heard a big clunk noise come from the front end , when I take it out of 4x4 the noise gos away , when I’m in 4x4 I can give it gas and I hear the clunk noise and when I let off the gas I hear it again . Any suggestions ? Thanks