97 LX450 Today an intermittent yet obvious problem in the Front Right presented itself. It felt like when you go from smooth Highway to the groove pavement noise and vibration. Considering temperature, After an hour drive avg 70mph, when nearing destination, in a 35 zone the problem started going in and out. It did not change with brake application, or steering direction changes. It appears to be a rotation only symptom. I stopped at a mechanic shop and removed wheel, brakes looked fine and he couldn't determine noticable play in bearing... however it would not show the symptom when he drove it, smooth and quiet. Sure enough, as soon as I was trying to make it home it started again. I chose to not go across the lake bridge but gave it a chance to get home without towing. However, on another highway averaging 55 it didn't show up, until nearing my destination it did it again, for a second or two. I am wondering if the bearings are becoming faulty and what would that sound like? It's just like going from smooth to grooved shoulder. Does this sound like an axle problem or something else? In anyone's experience? I picked up bearings and seal and will have a look in the morning, meanwhile I am searching the forum. Thanks in advance!!!!