I wanted to change my transmission fluid, as well as replace any gaskets, filters, etc. I got a new pan gasket, but was unable to purchase a new filter or screen. Is there any replaceable filters or screens? Should I remove the screen and clean it? If so, how do you clean it? Or should I just leave things alone? Is there any maintanance that needs to be done? I figured while I've got the pan off I might as well change the screen or a filter or something. Thanks!