[GT John]

The thunking sound your hearing is not limited to the 07's.

This issue goes all the way back to the 05's.

The issue is the front sway bar, rod ends and the attachment to the front struts. The the thunking sound your hearing is probably coming from the passenger side front area.

The only way I was able to get rid of the sound was to install a BMR Front Sway Bar and Radiator Support Kit.

Like you, when I first heard the sound I about crapped my pants thinking that the front right strut was toast and would need replacement.

But since I was trying to go for better weight transfer to the back tires I removed the front sway bar. Lo and behold the thunking sound dissapeared and hasnt been back since...........almost a year now.

If you remove the front sway bar the thunking sound will go away.

I did install a dual Strut Tower Brace to tighten the front end up. The GT performs very well in turns.