Sounds like it. Is that the reason they went with the flat bottom on them, to reduce the quantity of oil needed to tumble down the axle tube? I would guess as long as the ring gear is picking it up, it would get slung everywhere and travel down the axle shaft and tube, eventually reaching the bearings. This explains why my rear outer hubs run cooler than my fronts though. You can tell I have not had mine apart, as I didn't know the A2's were already oiled outer. I'll be doing the opposite, and converting the rears of mine into greased outer, as I am making a trailer from the back half of an M923A2, and pulling the drive axles and eventually differentials out of the housings, and retaining the CTIS, so making them the same as the fronts essentially.