This kit contains all of the seals used on the stepper, Main rod seals, Cylinder O ring seals and O ring for fill plug. The kit also contains a small funnel needed to refill the stepper cylinders with oil. The only thing you need is a quart of automatic transmission fluid. Kit comes with instructions on how to replace the seals and refill the system with oil.

Here are several video files about repairing the Stepper and installing new seals. http://www.driftwoodsolutions.com/Stepper_Repair_Save__400.html