slightly2ned

Have you checked your Cat cover to see if its loose or maybe broken? I remember my brother's cat cover broke & it made a rattling/buzzing sound

NapaS2K

Hmm, I'll check the cat. That's a good possibility, thanks.

dnick

Pretty Good Bet you have lost one of the bolts that hold the "canister", postioned just to the driver's side of the drive shaft, just in front of the differential housing, pretty much even with the cat (which is on the passenger side). The bracket holding the canister in place has 3 or 4 bolts, and if you lose one of them, the bracket rattles.

TougeHorseman

I would say get a Billman TCT, and check all the cat-related bolts/shields, and the cat itself.

itS2Krazy

i agree. its the easiest thing to check. this is common.

kaansahbaz

I would say, one of the bars might have a lose screw as well