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Guest · Posted: Wed Jan 19, 2005 9:00 pm Post subject: Vibrating/resonating tailpipe

I have a '99 dodge dakota that recently had the catalytic converter and
exhaust pipes replaced.

I'm now getting a strange resonating sound between 30-40 mph -- It
sounds like someone blowing across the top of a pop bottle. The sound
stops when you let off the accelerator. It's definitely coming from the
back of the vehicle. I crawled under the truck and inspected the
exhaust but could find no place where it might be vibrating against the
truck body. If I had to guess, I'd say the tailpipe was vibrating at
such a high rate of speed when traveling 30-40 mph that it begins to
resonate like some sort of musical instrument.
Does this make sense and if so, what can I do about it?

Thanks

Daniel J. Stern · Guest

On Wed, 19 Jan 2005 todd_shryock@hotmail.com wrote:

Guest

The dealership replaced the cat because it was a warranty repair, so
I'm assuming they used a Dodge cat. The pipes were done by my usual
garage, but I don't know any more than that.

I can tell you the pipes (from the cat back) were done first, because
the garage wouldn't touch the cat until/unless they were replaced
because they were in bad shape. So the garage did the pipes first, and
there was no problem. A few days later, the cat was replaced and then
the sound started.

Sportster4Eva · Guest

todd_shryock@hotmail.com wrote:

Daniel J. Stern · Guest

On Wed, 19 Jan 2005 todd_shryock@hotmail.com wrote: