The belly is the best pace to jack it up, take the wheels off and drain the hub fluid and refill. it will take you maybe 15 minutes. When you put new fluid in the hub put some in then put the screw back in and spin the hub around a little bit to get the fluid in there real good then check it and top it off. Also Sears sell an atv jack for about 100 bucks that works great. picks up the entire quad securely and wont fall off the jack.

 

ya i have a sportsman 400 2003 same deal with the four wheel drive if u switch it 2 4x4 it doesnt go into 4x4 untill ur rear wheels start to slip i plow with mine in 4x4 in low gear in my opinion i believe it works great fer plowing i think its one of the best 4x4s ya and they still use it on the new bikes if u need to check 2 see if the 4x4 is workin either get it stuck lol or jack it up with all 4 tires off the ground and put it in 4x4 and see if all the tires spin also if u rip a boot make sure u put the magnet on the same way u took it off or else both front tires wont lock in learned from experiance

 

Please use punctuation, it makes reading your post much, much easier [img]i/expressions/face-icon-small-wink.gif[/img].

Gilly, the polaris system is very well designed. No electronics to worry about, no complicated mechanics either. It uses overrun clutches, so when the rear tires slip, the front is going slower so it kicks in. Once the front tires are going the same speed as the fronts again (traction regained), it unlocks. Simple as can be; when locked, ALL 4 tires are locked together - no diff action.

As the experts already said, keep the diff fluid fresh and you should have no problems. Just remember when refilling that you want the hub about half full, so fill it up with the hole at the 12 oclock, then turn it to the 3 or 9 oclock and let it drain a bit. Too much oil in there can cause leaks.