Ford tech here, the Taurus is a great buy. Let me clear up a few things. First, the rear pumps on awd models is not an issue on Taurus. That was a 500/Freestyle issue. Second, Taurus seems to have far less PTU issues than Edge or Explorer. Exhaust placement has nothing to do with it. A seal between the trans and ptu goes bad, allowing atf (7.5w) into the gear oil in the ptu (75w140 aka ~50w) Its an extended warranty repair though, and the new design is solid.