Waste of time to change the filter that can stop the life blood of fluid from flowing? I’ve changed half a dozen tranny filters in VXs at 15-30K and it DEFINITELY needs to be done - there is some nasty funk in the filter and in the tranny pan. I flush my system at every other change at Jiffy Lube to get all the fluid changed in the converter (10 qts) and at the other intervals, I go through the hassle of supporting the driveline, dropping the crossmember and removing the pan.