Hi everyone, my neighbor just bought an 09 RZR last thursday. He rode it around the house and maybe put 8 miles on it. He went camping this past weekend and planned on having a fun time. On the first ride he n oticed that only one wheel was spinning. After a few more miles he knew something wasn't right. What happened is the c-clip slot was to large for the c-clip. you would put the shaft back in and it would pop back out. After 80+ miles. he had enough. He was not a happy camper. Amazingly it didn't rip the boot. He took it back to Polaris on Monday and Dealer had mentioned that this problem was starting to pop up on the 09 model year. Dealer is replacing the rear diff and half shafts. Hopefully it will be done right. Neighbor was fit to be tied because dealer wouldn't let him have a loaner rzr or his 05, 500 Polaris he just traded in for the rzr to use while his was down. Anyway keep an eye out for this problem.