So, I put a new cherry bomb glasspack on my 2004 dodge ram 2500. The exhaust sounds great but every so often when I accelerate, I hear a whistling noise. It sounds like the noise is coming from the passenger side near the front passenger floor and dash area. What is causing this? Where do I look to fix this?

Also, no the noise is not the ac/heat blower!!

 

So all you did was replace the muffler? Get under and inspect the exhaust system, thats where you look for starters. If you find a hole or something, fix it.

 

Yeah I did look at the exhaust system and no holes or anything I could see. I should also mention that the whistle does not occur when I floor the pedal or at idle. It only occurs when you put the pedal about half way down. Lastly, when I am in park and rev it up there is no noise it only occurs when driving? I am stumped.

 

Did you clamp on the muffler or use 360° welds? I think it possible to have a leak with the clamps.


If it's from the interior I'm not sure what is all under the dash as far as what could cause the noise. Could it be a coincidental vacuum leak that has nothing to do with the exhaust?

 

I had a single chamber Cherry Bomb installed on my Ram. No whistle but mine was welded onto the pipe... no clamps.

Could the whistle noise be stereo interference?

 

Might want to check your exhaust manifold common problem of the bolts on the rear drives side breaking or the manifold cracking