hello...I have a 2005 2 wheel drive sequoia with 160,000 miles on it. I am getting a roaring noise that sounds like it is coming from the front end, but not sure based on the following. I had it in a shop and they heard the same noise and checked the tires and they are all ok, so they replaced the 2 front wheel bearings and the noise is still there. They looked at it again and had it up on the rack and could not isolate the noise but heard noise at the tail of the transmission, at the rear differential, and at the drivers side rear tire and at that point they were at a loss for what to do. they didn't think it was the universal joints, maybe something in the transmission or rear differential, but they were not sure. the noise itself shows up between 45 and 55 mph and continues when I shift into neutral as well as if I take it out of overdrive. the noise also gets louder when i slow down without braking and it also continues if I shift into neutral or in and out of overdrive while coasting to a stop. any suggestions before I take it to the dealer??