I have been up and down the under belly of my 2017 F150 looking for this damn rattle. Nothing shakes around that is making this noise.

My last guess is leaf spring isolators (which I just ordered), otherwise, I can only assume its something in the frame itself.

In this video, I am running over a 2x4 to make the sounds happed. It sounds like there are 2 wrenches hidden away somewhere clanging together. I think it is only coming from the drivers side. In the video, when I run over the 2x4 on the passenger side you only slightly hear it.

To me, it sounds like it does come from further back than the leaf spring. Almost the very back driver sider corner. Also, It doesn't even look like in the video that the leaf springs even touch, unless its the springs that are always touching.

Any ideas?

 

I don't think its the leaf spring isolators. Almost sounds like a loose bracket rattle. Trying to think of any brackets back there though. Hmmm.

 

I know, I think that same too. I have pretty much touched everything under there in that area that I can see.

To me its sounds like like wrenches stuck inside some "compartment" I cant find a way into, or in the frame rails.

 

Trailer hitch perhaps? I put a silencer device on mine. I leave it in all the time and the device tightens it against the receiver to keep it from rattling.

 

Nothing in the hitch, nothing about it rattles. I can take a better video tomorrow looking around it.

 

Spring leaf Clamps, Shock mounting, Spare tie hardware.
Good luck

 

Gonna remove the tailgate tomorrow to rule anything with that out.

To me it really sounds like something nearly ALL the way in the back from the tailgate area.

 

Gonna remove the tailgate tomorrow to rule anything with that out.

To me it really sounds like something nearly ALL the way in the back from the tailgate area.

 

Metal clamps rust through and break on exhaust hangers, replace as needed with hose clamps.

 

I've jiggled the exhaust / muffler the little that it moves, doesnt seem like its from there. Plus the sound doesnt seem like it comes from that area.