I have a 2006 Mule 610 and it has an awful clunking noise whenever it is put in 4WD. It sounds like it is coming from the front end. Sounds like a broken drive shaft. Does anyone have any idea what this may be?

 

you may have a bad cv joint. i would recommend putting the mule on blocks or jack stands and put it in gear and try to locate where the clunking is coming from. you may just be able to spin the wheel's while jacked up to find the problem without starting it.

 

Thanks PaulJ. That's my plan. I sounds like a broken u-joint or something like that.