Had my tranny fail which is common in SVXs. The garage which did the R&R did a drain and fill tesulting in the rebuilt tranny failing due to tesidue crap in tranny cooler/lines from failed tranny. Took car to tranny shop which used an exchange machine and ran fluids thru the tranny for almost an hour to completely flush the tranny, 2 coolers, and all the lines. IMHO - this is the way to go to insure acomplete flush.