I have a 2001 Rancher 350 SE. I went mudding yesterday and went threw a mud puddle about 2 feet deep in 2nd gear then I heard a pop and my quad stayed running but will not move. It changes gears and stays running but will not move does anyone have any ideas on what it could be.

 

driveshaft....rear gear....universal joint....

look to see if the shaft from the rear of the transmission is turning, if it is, then it's rear gear...if not, then you have something broken inside the transmission