The Toyota Transmission Housing (#35111-04020) is a crucial Drive-Chassis part, housed in the Transmission Case & Oil Pan (Atm) system. Serving as the primary casing for the transmission system, it encloses various components like gears, shafts, and bearings. It ensures that these integral elements are protected against road debris, water, and other harmful externalities. Inherent to its function, the Transmission Housing (#35111-04020) experiences substantial wear over time. Aging or broken housings can expose internal parts to harmful elements, potentially leading to transmission failure. Regular inspection and replacement, using only genuine Toyota parts, is imperative to maintain vehicle compatibility and performance. Remember, every genuine part is backed by Toyota's genuine parts warranty. Lastly, a well-maintained Transmission Housing (#35111-04020) promotes better fuel efficiency and overall safety, by ensuring that the power generated by the engine is transferred smoothly to the wheels of the vehicle.