i have a buzzing noise comming from under the cab of my truck as soon as i put it in gear its really quiet and the harder i hit the pedal the lauder it gets? when i put the truck in nutral i can hear it too when it revs up really fast does anyone know what this could be i need some help i have a bullydog tuner on it so im guessing my warrenty is voided i have 60,000 miles on the truck

is the radio turned off when u hear this noise or do u have the volume turned all the way down?

the radio is off, i got stuck in nasty sand last week but i dont know if that can have anything to do with it

it goes up as the rpms go up it sounds like a turbo noise just lauder and deeper and the more pressure you put on it the lauder it gets, do i have to change my tranny fluid or filter my truck just hit 66,000.

Could it have something to do with the belt? it was recently replaced

I guess to rule out the bullydog return it to stock.
I wonder if your hearing some kind of exhaust leak. Maybe something is broken loose and flapping against the firewall. Just hard to say without hearing it.

Brian

i took it to a shop they just looked at it and they said it sounded like it was an exhaust leak, i took a vid of it but i dont know how to post it, how would i post it

I think you post to youtube first. Then post the link to the video here.

Brian

heres the noise it makes its the noise you hear the clearist it goes up and down with the rpms YouTube - 0106111557.3g2

good grief, almost got dizzy looking at the video...lol, When you got stuck did your truck sink down enough to have something hit underneath. It does sound like a exhaust leak, wonder if the down pipe is causing the leak.....

Sorry about the shitty vid . But for all you guys who said exhaust leak you were dead on two bolts loosened infront of the dpf that where the noise was coming from I'm suprised it didn't throw any codes

Glad you got it resolved.

Brian

thanks for everyones help