RZR XP 1000 XP1K 4wd will not engage November 22, 2015 I just installed a billet Sprague and replaced the sheared roll pin in my front diff.Now 4wd wont engage in forward but it will in reverse.What could I have done wrong?Or is there something else broke? Any suggestions? Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related