The other day I noticed a little more strain on my drivetrain. I thought it might be an axle bearing. My U-joints look good. I have a little diff fluid seeping out or the rear so that was my suspicion on the rear-end. Should I be able to twist my front drive shaft around freely if it is in 2 wheel drive? I'm still not exactly sure what is going on. Been looking at prices for 14FF. Not ready to make the $$$ plunge right now. Can someone offer an opinion on what might be going on? The symptoms are as follows... While driving I experience a small amount of vibration accompanied by some noise. The noise is undetected unless I'm travelling at slower speeds. I've only driven a total of 12 miles since this has happened. The rear diff cover has some seeping. Not very much but enough to glaze the cover. It might have leaked a teaspoon total. Any ideas?