grinding

Recently, I started to get a weird grinding/stuttering noise when my automatic transmission shifts. The grinding noise can start from the 5500-6000 rpm range and only happens when it floored. My guess is that it has nothing to do with the transmission and everything to do with the cat being...

Tried looking at other posts first, but didn't see anything similar. I have a 2006 manual with 92K miles on it and I'm getting a grinding from the front end. It's pretty bad when you're in the forward gears keeping RPMs or decelerating after acceleration, but won't do it at idle in neutral. Not...