[sero901]

I have noticed the last month my car is pulling HARD to the left when i hit the throttle. When i release it it snaps back to the right and drives perfectly straight with hands off the wheel. Its getting to feel very unstable on the highway. You cant really feel it until 40-70mph or higher. There is 30k miles on the car now (2014 FRS). I took it into the dealer yesterday because my battery would no longer hold a charge and asked them to check it out. They took it for a 1km test drive (not sure how you could leave the dealer and replicate the issue and come back in 1km), then they put it on a ramp to check for bent parts which was pointless because i know the car has never been driven hard, drifted, raced hit anything or any other abuse. After all that they gave me a $70 bill and said the tire was a couple PSI low on one side and "it seems to drive straight". I have had other people drive the car and say it does not feel right. Anyone have any ideas what it could be. I was thinking it could be something in the LSD? Any ideas would be great before i go back to the to the dealer.
Thanks