Intermittent vibration

I am having intermittent vibrations in my 15 passenger Ford van after the van was towed on a flatbed tow truck. Usually drives smooth without vibrating, but occasional vibrations at various speeds and strong vibrations one time when braking. Not tires. Something is loose. I suspect the tie-downs were too aggressively tightened and they bent/broke/or loosened something. Maybe a steering tie rod or even a wheel bearing. Intermittent is a key. The van is not a fragile sissy vehicle; takes real force to shake it.

Tossom My Toyota Camry does the same thing you described…everything you wrote has exactly happened to mine…I had brakes done also an resurfaced.it vibrates intermittently at different speeds like yours…have you found a solution ? I will be taking it to a third mechanic…know one can find the problem…it doesn’t happen when they drive it.

I had the same problem. I had the shop rebalance three times.
I used an infrared thermometer to measure the front discs. 317° vs 106°. Sticking caliper.

Really don’t understand how this could cause it.

Maybe: the dragging pad eventually heats up the rotor and it’s not a uniform heat and then the rotor warps and the vibration starts.

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