Alright boys, let me borrow your collective ear for a minute. Listen to the two videos I uploaded below. I was fairly certain when I heard this squeak that it was a bad u-joint, the "angry sparrow" noise, as my Jeeper friends call it. I was 90% sure it was the front joint, but I just got finished pulling the whole front driveshaft out, and surprise! the damn squeak is still there - just as loud and just as annoying. Before I go yanking the rear shaft out, I want to first post these videos of the noise and get your opinion on if it even sounds like a u-joint at all. The first video is the noise from a stop. Starts off sounding like a creak and then progresses to a loud chirp as I pick up speed - "the angry sparrow". It disappears at roughly 20-25 MPH. The noise is usually only present under acceleration, and not coasting and sounds rotational as it picks up speed as the truck does. http://www.youtube.com/watch?v=vsn8g58Yjqw This second vid is the noise audible, then not, then audible, then not, etc. as I step on the gas, then let off and repeat. http://www.youtube.com/watch?v=1Y7uilUZmO8 Any thoughts or assistance appreciated.