Let me say this about aftermarket hydro filters . Had a firend cross his filter to an aftermarket filter and after all was said and done , the tractor would not move after the filter change. Went and got an exchange and the same thing happened again. Took that filter back,got the correct filter from the dealer , put it on and everything was fine. Wasted about a half gallon of fluid along with lost time driving back and forth. Dont know if it was the brand of filter or not but the factory part was fine.........