252,000 Miles on Yaris - wierd noise

[Rutherford]

Thanks for the reply. I have been told that the filter is nothing more than a screen and some recommend just doing the fluid drain. Evidently there is a 10mm hex plug in the pan. The problem I have is I will be doing this on a gravel driveway and I may do more harm than good opening the pan under those conditions. Trannie is still shifting OK. Do you think the filter is really something I should absolutely do.