Originally Posted By: RF Overlord
Originally Posted By: FusilliJerry82
Two Supertech ATFs meet T-IV, their Mercon V and Dexron VI formulations. Does anyone know which formulation more closely follows T-IV spec?
Jerry, I can't answer your question directly, but know this: my niece has an '06 Ford Fusion that uses the Aisin AW21F transaxle, which specs T-IV. I've read numerous reports on both Fusion forums and in Mazda forums (the Fusion is a badge-engineered Mazda) that say that mixing T-IV and Mercon V is a BIG no-no. Apparently the 2 don't play well together and can cause significant damage. Supposedly, you can do a complete fluid exchange to Mercon V and that works OK, but I'm not going to use someone else's car as a guinea pig. T-IV is only about $5 at the local Toyota dealer and it only takes 4 quarts for a drain-and-fill.
The reason I'm using an approved fluid is based on this reason (transmission failure) as this has been a problem with the 2001-2004 Volvo s40s (I drive one) and we've done our research.
Confirmed by Mobil, Toyota Type-iv, Volvo ATF, all of it is just manufactured/wholesale by Mobil and redistributed under each dealer's name plate (i.e. Audi, GM, Ford, Mazda, or any T-IV application).
Anyways, in Canada, most stores have recently started carrying 3309 so I've picked up jugs of that. It's great because now I don't have to barter with the dealer who charges outrageous prices for them ($8 a litre/bottle! with no discount). At least now, I can leverage the stupidity of stores and luck out on the pricing of the fluid.
Today I picked up 3 x 5L jugs at $5 each because of the retailing pricing laws here and improper signage on those jugs (usually $32 / 5L).
So I did a full flush and still have enough left over for another one, plus a drain and fill.
I use 3309 because it is the cheapest with no additives. I think there may be slight torque converter damage to it since the vehicle was in a front end, so I may try Auto RX, but it is just very slight that I think I can get away by doing drain and fills and full flushes every 30,000km and 50,000km respectively.