I have a 2013 Ranger 800 Full Size. I drained the Diff oil from underneath in Skid Plate. I read it should take 41 oz AGL oil but I have pumped 2 quarts in the rear fill hole by the hitch and its still not coming back out that hole. I would have thought it would seep out the bottom of the fill hole if it was full. Thoughts? And thanks in advance!!!!