I'm just curious if anyone has had any experience with getting a transmission flush? Where they hook up a tranny flush machine and clean out the tranny with chemicals and what not, replace the filter, and refill with fresh fluid? I questioned about it on the Ranger forum as I have a 99 Ranger 4.0 and some say to get it done, and others say not to have it flushed, only get the filter and fluid replaced b/c the flush process has ruined their tranny. Anyone have any input on this?