Still on drain plugs, but this time the rear axle. Before undertaking the trip to Victoria for our Australian National Meet I checked the oil in the diff. It was ok but ever since then it has had a small leak! I thought it might be the seal on the filler plug (four stud axle, so the plug is located in the nose of the diff). Last week I replaced the fibre washer on the plug but the leak persists. As there is no film of lubricant around the filler I am confidant that the filler is not the culprit. Could the drain plug be the problem?
Back on gearbox oil, I use Penrite Gear Box oil, 40 weight. I recommend this product. Are Penrite oils available in the USA?