Fix the shunt. Smooth out the shifts. The Anderson Design & Fabrication Anti-Wobble Insert eliminates the transmission mount slop that causes that characteristic clunk and hesitation in your Subaru Forester — especially noticeable when coming to a stop or transitioning between acceleration and deceleration. The factory rubber transmission mount insert softens over time, allowing the drivetrain to shift under load. The ADF insert is a precision-machined upgrade that takes up that slack, giving you crisper throttle response, reduced drivetrain vibration, and a noticeably more planted feel on and off road.