Torque Solution Rear Differential Lockdown SystemTorque Solution Rear Differential Lockdown Applications: Subaru WRX STi 2002 2007 , Forester XT 04 08 Torque Solution continues to push the limits of high performance aftermarket products with our "NEW" Rear Differential Lockdown System. This system was designed to reduce movement of the rear differential. This helps to improve transmission feedback when shifting, and gives the car a more solid feel under hard acceleration. Developed to perform under