I have a problem with my 790 that I am hoping maybe someone could help at least point me in the right direction. I have been doing a lot of digging with the bucket in loose sand so I have kept it in 4wd. Yesterday I took it out of 4wd and there was a clunking noise every few feet from the front axle. When I put it back in 4wd the clunking goes away and the 4wd works. Anyone have any ideas what it could be? Or does anyone have a drawing of the front axle I could use if I decided to take it a part. Thanks