ok, me and my friend both have 95 polaris magnum 425's with the same problem. when you are in snow are mud and you hit the trottle hard while the machine is in 4x4, the right front hub(or something) starts to click (especially in reverse). anyone have a reason? we both cant figure it out. he also has a 400 sportsman 2-stroke 4x4 that does not click at all in 4x4.

 

r the chains adjusted properly, that may be the sound ur hearing, and make sure there is fluid in the hub, also on mine, when i would be going in reverse with a lot of wheel speed and back off, i would here a click and it was the chain in the transmission

 

you could also have a busted cd joint.

 

yea i put fluid in the hubs this summer and found out the frots wont spin without fluid. ill ask my buddy about the chain thing. he has taken his apart a few times as i just bought mine over the summer and have nto taken it apart yet. thanks for the help