All my trucks have oil bath bearings and they are the way to go. No greasing needed, just be sure you have enough oil in the rear and do a hard left and right, every now and then. I had one big issue once. Sent a rear drum in to have turned and left the bearing in for the shop to remove in case they needed it in. They turned the drum with the bearing in it and crushed it, without telling me. The next day coming home from work, I lost my axle on the highway. DO YOUR OWN CHECK!!!!!!