[vector1]

get a piece of #9 wire and shape it to stick in one of the rear holes to find the level, will give you a good idea. i wouldn't worry about being higher than the bottom of the axle tubes, fluid running through the tubes can keep the bearings at the ends lubed. as long as you don't have any fluid coming out the ends or the front seal i wouldn't worry, put the extension on the top breather, even the production stuff does this.