I have a 2013 Teryx4 with about 1,500 miles on it. Just recently I'm having issues when I lock the front diff. When I lock the front diff it will start to surge at speeds over 10 MPH. It does it in high or low, even on flat ground. It runs great with out the front diff locked in both 4w or 2w in high and low. Only has issue with front diff is locked. Has anyone had this issue?