i have a 2006 sportsman 800... im wheeling it in 2wd everything is going good im chewing threw a whole doing good and bam my shit locks into 4wd and i didnt even touch the button.. my fluid is brand new i did it friday night.. and another question is when im in 4wd and i take it out for 2wd sometimes it doesnt disengage so i have to reverse go forward and sometimes do that a couple of times