Solved! Strange noise from underneath truck

Hello, I've been trying to find what is causing the noise which sounds like rattling coins. I have a video I uploaded to youtube. When I drive over the rumble strip it goes frantic. I think it could be coming from inside the CAT... Any ideas?

Edit: I forgot to add, the noise starts after 60 mph. And still makes noise if i go to neutral.

YouTube - https://youtu.be/RZD8HWXJbDk

Thanks guys

 

too much air/road noise, at least for my ears

 

Lay under it and start wiggling/hitting stuff with your fist and see if you can replicate the sound. Or turn up the radio.

 

are your sway bar endlinks tight?

 

Thanks for the help guys. I finally found the annoying rattle I've been hearing. About 2 months ago I went to Town fair tire as that was the only place by me that sold 33x10.5r15 bfg's, they installed and balanced the wheels. I was knocking on the inside of my passenger side rim when I struck one of the wheel weights and it made a small rattle. I've been chasing this noise for so long I couldn't believe that was the problem... I put a piece of rubber behind the weight and voila, no more rattle! I cant believe how something so small can make such a loud rattle.
Anyways, problem found I will be going back to Town Fair Tire to get the weight properly attached.

 

At least it wasn't an expensive fix.

 

you can fix that yourself in seconds. what happens is the tire guy hit it too hard and bent the clip so mark the location then pry it off, bend the clip to have smaller opening with a pair of pliers, then tap back in place with hammer and its fixed.

why let them waste your time going the shop to wait for them to fix it when you can fix it yourself a lot faster then driving over there

 

Good call, i didn't know it was that easy. Thanks!