Nothing serious.. used to hear that whine from the rear diff. not any more. Now my greatest concern is the alignment which is out of whack for some reason and is eating my two front tires. Great car IMHO... perfect sleeper
Some old guy in his Mustang GT wanted some and he got it 2X ( he lost twice )
Some high schooler in wanted to race his 5.0 and I took him 3 times to 60
It could be that the CTS is just an awesome car, or it could be that Ford's just suck. I find it weird because I never get anyone really wanting to race me except for these GT guys.