Its a buzzing sound (metallic) which occurs around 2500 to 3200 rpms but matches gear shifts : when I shift is disappears for a split second but comes back in

Also this sound only occurs while driving: I tried replicating it in neutral, park, and even drive while e bake and regular brakes where held down (not safe and couldn't get to 3k rpms without pulling)

Any ideas? It seems to strike out exhaust as a possibility right? Or am I.missing something?

I'm looking at either exhaust or tranny as the culprit but need as much info from you all as possible before I bring it in.

Please help, I'm sure it would help someone else someday. Thanks!

 

is the buzzing there when you rev it to the 2500-3200rpm range in neutral?

if it is, it could be the heat shield(s) rattling. you can try tightening the heat shield bolts on the exhaust manifold and/or the heat shield bolts on the catalytic convertor.

i had that sound and it was an easy fix, now my car doesn't sound like trash haha

 

No I can't get the buzz in neutral though if I can get the up high enough I'll check the shields.

 

So I was able to jack the car up and check the cat heat shield by tapping it with a pole. It didn't seem loose. I also confirmed the sound can't be relicated in neutral (got it to 4.5k rpm no sound.

Could it be the transmission?

 

can you reproduce it on demand?

 

Yea so long as I am driving, it can be reproduced as soom as the tach hits 2500 rpms and stop just before I hit 3500. Continues even if gears shift so long as I am in the rpm range.

 

you still under warranty ?

 

No. Unfortunately I got 62k miles. Performed the lms recall at 61k.

 

hmm, i was able to reproduce my heat shield rattle while revving in neutral, but if you're game, go ahead and try tightening some of the bolts - you can't tell if they're loose by tapping on the heat shields, but if they are indeed loose, you will know when you turn the wrench. they just vibrate at a certain rpm range, enough to cause an audible rattle.

good luck, i hope that solves it

 

I have a similar sound while driving, but it is right around 3,000 RPM. I have a 2007 Fit, 5MT. The sound happens in any gear, either when shifting, decelerating in a gear, or in neutral. It is most audible when driving. I made sure the exhaust manifold heatshield was tight but I have not checked the catalytic converter. The sound has been happening for a couple of months now. Definitely weird how it is at a specific RPM range. I will check more bolts/exhaust connections. Any other ideas?

 

Hello, its been awhile but mine eventually went away.

I'm not sure what it was but did notice a few things were off:

1) Plastic bag melted to exhaust after cat and turned to droplets. Shaved as many of those as I could with a razor and it helped.