Hello all. I had my car tuned (2008 Pontiac G8 GT. Rotofab intake. 145,000 miles) by a "professional" that came highly recommended. Was initially happy with the tune and the performance of the engine and transmission. I called and asked him to make a few tweaks to the transmission tune and things got hairy from there. He shortened the shift time (not a technical term. I mean he made it shift faster) in the TUTD mode and I was very pleased with the results. After a few months of driving I started to get some flaring in my shifts and some slow lazy shifts. I also tried racing a few times and now my car will not break 139 mph. I am now back to my "stock" tune and needing help. Tunes attached for your viewing pleasure. Any help will be greatly appreciated!