Originally Posted by SPCBA
Definatly not a feature. Theres is something afoul. With all you have described replacing i really wonder if something got bent or is broken. Did you buy the car new?
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.