I bought a 2006 C70 a couple months ago with 78,000 miles. Two days ago it started to pull hard to the left when the transmission goes into third gear. The steering will will no longer be straight in the upper gears. When you slow down to a stop and take off again, it does it all over again. Steering wheel is straight and car is going straight in first and second gear. As soon as it hits third, there is a sudden jerk to the left and steering wheel is no longer straight. Any ideas what this could be?

 

Worn out lower control arms? (bushings)

 

I will check the control arms. Seems so weird that it only happens once it shifts into third and higher gears.

 

Update: It was the left side lower control arm. The bolt that attaches it to the frame was completely loose. Just tightened it and the pull went away. Thank you for the help.

 

not weird at all to show up in top gear - keep in mind the engine transfers the most torque at speed where you get the most resistance from the road. Glad you found the easy fix before something got serious!