[madmaxx]

Possible related. I had a lexus do the exact same thing after tire replacement. It was crazy, every time i gave it gas or let off it would pull to the left. I immediatly returned since it was not doing when I took the car in for tires. They had mounted "s' speed rated tires when the car called for "v" rated and said they see it all the time. They said the sidewall stiffness was the culprit, they changed to "h" rated since that is all they had and it immediatly went away. This leads me to beleive it is in the bushings or sway bar in the rear, you compress them under acceleration and they are not rebounding equally causing the car to swerve. Rember the rear tires track the car, the front turn it.