whine\\howl coming from rear end I have developed a nasty noise coming from the rear end that can be easily heard at speeds above 25 MPH under load amd gets louder just before you completely let off the gas. I can actually make this thing louder (More "whine" rather than "howl") when I slightly let off the gas. The "howl" noise is similar to the noise you would get from a manual tranny that is in reverse, or rather from running some big open tread tires, or maybe somewhere in between. Any ideas? Front pinion bearing? I can't seem to generate any play from the rear U-joint or the yoke on the rear end.