So my car has been having problems today. At fist I thought it was the transmission was all messed up. Feels like it's slipping. Feels like it's stumbling on its self to. So it made me think transmission. But what's super weird. Is my exhaust is so quiet now. My cat back is no res and muffler that has a crack in it. So it's super loud. Well since this problem. It is so quite now. So I was thinking a clogged cat maybe?