It first started last night. I was stopped at a light to get on the freeway. I accelerated hard and there was a slight grinding noise. I didn't think much of it at first. Well then it happened again this morning. It only happens when I am at a full stop and I accelerate hard. It doesn't happen in any other gears when I step on the gas and it doesn't happen when I accelerate gently from a complete stop.
The only recent changes I've done to my car is the 22mm rear sway and x-brace that I installed on Saturday. I did some spirited driving over the weekend and didn't notice anything. Can anyone help point me in a direction for what I should check? Thanks!

By the way I have the 6-speed auto.

 

I checked the upper engine mount and there is definitely a dark substance below it but is is covered in dirt and looks dry. I tried moving the engine and there is slight movement, not very much when I rocked it front and back, but when I lift it up and down the little black square pushing on top of the metal cylinder comes up off the cylinder about a 1/4". I don't that that should be normal but if someone could clarify please.

Also the noise occurs when I accelerate at speeds around 20mph as well. I just heard it again.

 

Bueller.....

 

Bueller is posting on that other forum. Yep the forbidden one. Lots of help over there.