oops, sorry Mr. Moderator, not sure how I managed to post this twice in the wrong spot, meant to post it at the end of the thread...... sorry guys!!!
Hi all,
Just wanted to provide an update as I started this thread back in 2008 and am still enjoying my G8 GT, but with substantially less vibration if any at all in most cases. It all came down to improper wheel balancing over and over and over. To this day, it is still not 100% balanced, but is 99% perfect. I had to take it to several private wheel and tire places as the dealer network just didn't care, or employed people with the less than required skills to do the job right. I don't think the Goodyear Eagle RS-A's are as horrible as I had originally thought, but I am happy to say I am rolling on Kuhmo Ecsta SPT summer tires which made a massive difference in ride and handling as well as getting off the line. Anywho, I am glad to say it has absolutely nothing to do with DOD, TCM, driveshaft, mounts or any other of the potential things it could've been based on the other posts. The only thing that is quite evident, is that tempurature is a huge factor in the vibration or lack thereof, even after waiting for the tires to warm up. (is it possible that the alloy used for the wheels is just extra sensitive to tempurature or that they're just extra sensitve to wind and road vibration?...I have no idea how or why as I am not an expert). Either way, it's all good, the G8 is likely to become a modern day collectible due to Pontiac's demise and the GXP is not coming to Canada which helps with the values as well. I'll update again, thanks to all who've responded as the feedback was helpful.
Ryad
