Eaton E-Locker for GM 9.5" with 33 spline axles. The Eaton E-Locker uses Electro-Magnets to provide full lock-up at the push of a button. When the unit is disengaged it is a standard open differential. This unit comes with all associated parts and hardware for operation. Eaton offers a one year warranty against manufacturing defects. Eaton voids this warranty if the vehicle is running any tires larger than stock.