Over time the links in the five-link rear suspension wear out. The earliest to fail and most common to cause your acceleration symptoms are the torque and thrust arms. They are the diagonal arms. The other links in the suspension are the camber (Top), tie rod (w/ eccentric cam & ball joint) and the spring link (lower control arm) - these last longer. When ordering torque and thrust links, you'll need two sleeves per side and new bolts kits. Good luck with your new car.