When I hit about 15-20 mph and right at 2000 rpms I first thought it was an exhaust rattle then maybe a heat shield but u can't figure it out.... Then someone said maybe the cat. Is going bad. Or maybe even a baffle we t out in the muffler. Any way to figure out what it is??? I've narrowed it down to the cat or the muffle baffle. It sounds just like a rattle im just not sure what it is.it's just a really annoying rattle!!!

 

No one has an idea? Maybe the Y pipe? If I replaced that would it fix it?

 

When mine was doing that on my tj, it was loose at the manifold to pipe connection. Outside of something being loose idk....

 

I'm having this issue as well. Any help is appreciated. I havnt really taken time to investigate it fully since it isn't too bad.

 

Don't have a clue what sound you are hearing but, when I swapped the Y-pipe on my 2012 for the AFE pipe, I was literally able to take half the screws off by hand because they were so lose...maybe that will give you something to check out

 

If it was just a loose bolts or something like that wouldn't it do it all the time not just at a certain point?

 

Not sure what year you have but my 07j jku was making that sound. It was the heat shield by the transfer case. It happened twice. Both times the welds cracked. They doubled it up this time.

 

Mine is an 07 jku too

 

I have the same rattle not sure because I took it offroad?? But every time I excel erate I hear a rattle. By driver side? By wheel through the driver door.

 

Yeah that seems to be close to where mine is too...