Hi I'm new to the forum ive had my fourtrak since November all has been well except from the fan belt snapping but that was a easy fix we've had a bit of snow today so I tho I'd put it in 4wh so I engaged it standing still and then turned the hubs from two to four drove around fine no noises or anything after about a hour i heard a clicking sound only briefly then it stoped everything was fine no problems. Then later it sounded like a bang as if you were driving over speed bumps you could feel it but it felt like only the back wheels has any heard of this or any idea what it could possibly be thanks