With regards to the ATF types vs trans failure; I'm an ASE Master Technicain for over 25 years & a shop owner for the last 5. In addition to my own experience I have many friends who specialize in transmissions & have talked to reps. & engineers from major oil companies(E/M) & they all say the same thing. The type of ATF you use WILL NOT cause trans failure by itself. It may change shift firmness somewhat, but minimally. Most customers wont notice. If it fails after a change there is some other underlying pre-exsisting condition that would have cause failure or problems soon anyway. Worn parts, bad seals etc.
