Same thing I observed in J&M 10 ton running gear wheel bearings. Bought a couple of these at sales and the old grease seemed hard and somewhat lacking. Pulled the bearings and hubs and refilled with the polyurea SD grease and it seems to do very well. Inspecting later the grease seems the same as when it was first put in there. Plus it's easy to pump through a grease needle to pack wheel bearings. You can slide the needle between the cage and the rollers and fill the bearing then turn it in your hand before installing. Seems less wasteful than the cone type packer that needs 15 or more shots to fill the gap between the bearing and the center stud of the packing cone.