I fix the RZR 1000 diff by replacing the pinion bearing and reinstall back in the RZR. I go over all the seal part numbers and bearing to make it easier to source parts. Links to things in this video: Pump - https://amzn.to/2UgRvWb Bearings and Full Seal Kit - https://amzn.to/2I4ctkX Snap Ring Set - https://amzn.to/2IbAsOf 3/4 to 1/2 Adapter - https://amzn.to/2I4cOEf