I am assuming you have the "Green Bearings" on the axle because you said you changed the o-ring. If you are not running inner axle seals put them in there. Green bearings are self lubricated and do not need gear oil to lube them. The gear oil is either leaking through the bearing or around the outer edge. The inner axle seal will prevent that.
Jeff
Ya, green bearings with O-rings.
Thanks, I'll try the inner seal.
install a new seal, the wide one that you drive in
Do you mean the inner oil seal like Jeff above mentions? This gets "driven" into the axle housing, correct?