Engine and Drivetrain oil go out of transfert case vent August 15, 2015 hi, i have a 2010 rzr 800 efi and after changing oil of the transfert case and transmission, the oil go out by the vent after stop my rzr why do that. I put the polaris synthetique oil. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related