Chassis Ears
About eight years ago I was trying to figure out where a noise was coming from on my OT truck. Here is a link that I participated in on the Garage Journal:
https://www.garagejournal.com/forum/.../#post-3787742
Here is the post that I copied and made on that forum, in case you aren’t able to view it:
yogitech said:
I work for a Ford dealer and do most of the frontend/ noise concerns. I use them a couple times a week. I have wired and wireless chassis ear sets. Theres really nothing to it, clamp it on and go. Move them to where you think the noise may be coming from. Where ever the noise is loudest start looking over that component.
Get the wired ones for home use, there less finicky. My wireless set seems to pick up a ton of interference. Other than that, sometimes that's the only thing you can use to find the problem.
Using your guidance, I bought the Steelman Products 06600 Chassis ears; which can be had for under $100. My truck has a noisy wheel bearing and it wasn't evident which one was bad. I had a chance to use them yesterday and they worked after a fashion. When I first installed the microphone/clamps, at all four wheels, I didn't pick a very good spot and got erratic data/sound. So I moved all of the microphone/clamps to a backing plate bolt and drove around and it worked like a champ. I can see where these would come in very handy in the future.
https://www.amazon.com/Steelman-Prod...s%2C688&sr=8-1