I am having a problem with the front differential locking one wheel in gear after coming out of reverse.  The fix is to crank the wheels all the way left and right and it unlocks.  Until you do, it pulls hard to the left or right.  Anyone seen this before?

 I thinks that Rick's quad was doing that for a while, He has the Sportsman 600 twin. After a while it stopped doing that and I dont think it has come back yet. I would check your diff fluid levels and or replace with Synthetic gear lube.