outlaw 525 IRS popping!

[chopshopcustoms]

hey, I'm new to this forum and in desperate need of info. I have a early production outlaw. Its makeing a loud popping noise in reverse and on hard right turns at low speeds. I know it will be a failing cv joint. But how do I go about pinpointing the bad one. Would rather not replace all three becuase you can only get at Polaris and they are asking an arm and a leg for the replacements.
Thanks for any help you all can give!

[Chris525]

three?
is there movement in one when you grab it and try to move it around and / or do the boots around the ends look weird

[chopshopcustoms]

both sides move thought was because of early production wheel bearings. Does it make a diference

[chopshopcustoms]

both shaft are realy tight. I found by lowering the ride highth that the popping is not as bad but still there in reverse. I set up shocks by the owners manual? Can it be off? I'm also running dura blue1.5 extensions could this be the problem?