Originally Posted by kmcd
Yep. It's been that way since it came off the truck. It always starts at 50 mph, and stops at 60 mph. After that, you can accelerate all the way to 150 mph with no issues. Back when the car was still in warranty, dealer service dept could never find the problem.
I've had many cars in my life and most of the time when I would get a shake in the steering wheel it had to do with balancing, especially if it was good to a certain speed, than a few miles per hour past that it would shake. Once you get past the harmonics it would stop. When the shop rebalanced your tires did they completely clean off the adhesive from the other weights? One shop did not do that and it drove me nuts for 2 weeks until I removed off the tires, took off the new weights and cleaned up the entire inner rim and then had them rebalanced.
It also could be that the tire is out of round as that happened to me a couple of times.
Do you get any shaking in the seat of your pants as that would indicate the rear wheels, driveshaft or a combination of both?
Have you driven someone elses car to see it the shake is there? I have a 2011 with 26K on it and I don't have any shake, but the roads out in Phoenix are smooth as glass.
Good luck with it.