Hi, went to change the front axle oils, diff no prob, but problem in the front drives, dirty oil in one no oil in the other, so filled one and oil leaking, so jacked front up, and looks like both wheel bearings in hub are shoot, so how easy are that to replace ?. Also, dropped the rear axle oil, but is this the gearbox oil as well, the operators manual I have is as clear as mud, translated by idiots