T660 whistle noise can it be fixed?

i have been driving a 2006 peterbilt 386 but it looks like im going be stuck driving a 2010 T660, at least for the foreseeable future. the peterbilt is getting up there in miles and i think they might pull it out of service and sell it, 700K miles on it and the other day it was running rough, lacked power, and vibrating. i suspect a bad fuel injector, but as i previously stated i think there is a possibility that they might not fix it. so the other truck i might end up with is a 2010 kenworth T660 which has had its fair share of DPF problems. one of my biggest dislikes with that truck is a very annoying whistling sound at highway speed. most audible with the windows down (not a door seal). its a mirror or a trim piece, who knows. its a daycab truck.

anyone have any idea what makes its noise and how to fix it. it drives me nuts, i prefer the pete but doubt they are going to fix it because apparently they have decided its at the end of the road for that truck.

 

thanks i will relay that to the shop see if i can get them to do that. i hate that noise, especially when the weather improves and i want to drive with the windows down.

if i can get them to fix this particular truck maybe they could do the same thing to the rest of them. they have several T660's.

 

oh jeeze. my ears would thank me LOL. to think paccar produced those trucks and never fixed the problem pre-production is astounding.

 

The boss might actually thank me for digging up this information. He too complained about this awful noise back when he was training me. He too is a driver said he can't stand that noise but assumed it was the mirror itself