Shaking and knocking

Hello,

This could possibly be a couple of things. It could be your tires are out of balance or it could be a bad wheel bearing. To check to see if it is your vehicle's tires out of balance, just take them to where you purchased them and have them re-balance them. To check to see if it is a wheel bearing jack your vehicle up like you are going to change a front tire. Here is a link if you are unfamiliar with how to do it:

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

Next, go to the tire you want the wheel bearing on and try to move the top of the tire towards the vehicle and then the bottom of the tire away from the vehicle. There should be no play at all. If there is then the wheel bearing is bad and needs to be replaced. Please check your vehicle's tires and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

Welcome to 2CarPros. What you describe sounds like either a very out of balance or damaged tire. Or you have a failing CV axle that is causing the problem. Both are dangerous because either one could fail at any time. To determine what the problem is you would want to jack up and secure the front of the van. Then turn the steering wheel to the left. Make a mark on the tire and then rotate the tire while inspecting the tread and wheel for bulges or damage. Be careful as there could be exposed wire from the belts in the tire if they are damaged in that way. Next reach in and grab the drive axle and try to move it in/out and back and forth while you rotate the tire. It should move very little in any direction. Now rotate the steering to the right and inspect that side in the same way. Being that you hear a knock I suspect it's likely an axle but if you have a bad sway bar link and a bad tire you could get a knock from that as well.

Yeah those can do very bad things when they fail at speed. The good thing is they are not that bad to replace.