Hello Scotty, I have a 2007 Honda Odyssey EX-L 6 Cylinder Automatic with 252,000 miles. Just recently, the van started to shake a lot at the front of the car when accelerating from about 45 mph to 50 mph. The steering wheel shakes and the driver and passenger seats shake a lot in a wobbling like motion only at those specific speeds when accelerating and this can only be felt when sitting at the front of the car not in the back. That is around when the transmission goes from 4th gear to the final 5th gear. The tires were all out of balance so I had them balanced and rotated thinking that may fix this issue, but it is still doing the same shaking in the front. What could be causing all this shaking? Thanks in advance for the help!
if you're sure you're alignment and tires are good I'd suspect it's time for new wheel bearings up front
I just had a bad rear wheel bearing replaced a few weeks ago, at that time the mechanic said that rear wheel bearing was the only bad one when he checked.
Well I have to disagree with your mechanic. Your symptoms are classic front wheel bearing issues. Steering wheel shaking at between 40 and 50 mph. Frankly, I was being "generous" ruling out an alignment issue or a tire issue. They shouldn't be specific to that narrow speed range. A failing front wheel bearing does that.
Anyway, just "putting it out there" for your consideration
Have you had it aligned?
No, I have not. The tire guy said the tires were wearing out pretty evenly, so could it still need an alignment you think?
It also only seems to occur when the car has warmed up.
Also, they did say the CV boot is tore on the front passenger side. If that is tore could that possibly be causing the excessive shaking or would that not cause it?
The torn boot wouldn't cause it, but as @jack62 said it could very well be a wheel bearing. It wouldn't hurt to get a second opinion on that before looking elsewhere.