Terrible cab drone

Hush mat behind the doors and sleeper panels, as well as under the hood and floor if it’s doable. You don’t need to fill every single inch with it… thing works pretty #### good tho.

 

Checked it out - did you do the kit, or buy rolls?

 

Actually I used this. Also get application roller, I without order 2 boxes to begin with or measure the areas of cab and sleeper. Before applying I would use rag and alcohol to wipe dust off for better adhesion. Takes a while taking panels apart, but definitely a noticeable difference.

 

Also I’d buy extra clips for sleeper panels and door panels since few will definitely break

 

If they are strait through mufflers that would be my guess for the drone. Years ago I had Donaldson mufflers with a perforated core went to a cone shape then back to 5". When they rotted out I went with Pitt Power strait through perforated core and noticed the deeper tone and a slight drone, wasn't enough to bother me though.

 

I have a 2007 WS 4900 with a sleeper have the same issue. Added noise mats and nothing is helping. Let me know if you was able to fix the drone.

 

Sounds like it might just be a thing with those western star cabs?

 

It happens sometimes if the header pipe coming from the turbo is bracketed under the cab or to the frame under the cab. The noise transfers up thru the cab. Some pipes are bracketed to the engine first and that can make a difference in noise frequency. Aluminum and steel mounting brackets can make difference in resonance as well.