2009 Mazda 6GTJ3309

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Good question, I wasn't able to locate a recommended interval change. I would assume 30-50k intervals would work ok.
 

JeepRubicon2k3

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Yeah its not listed in the owners manual and the dealer says "bring it in and we will tell you when based on color/smell and performance." They say around 30K miles but that seems early for newer cars.
 
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IIRC, the manual for my '06(also an A-W 6 speed) called for 100k. Don't quote me on that, though. However after looking at some UOA's of T-IV(same as Mobil 3309) I came to believe that it isn't a long life fluid. So, I did two drain and fills, first at 50k, then the next one about 750 miles later. The fluid should be good and refreshed now till 100k.
 

JeepRubicon2k3

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I thought the 2009+ Mazda 6 are suppose to be 100% new, are you sure they are the same trans? Do you know where I could look it up?
 
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I'm not sure if they're exactly the same trans. But your manual shold state the spec of fluid, and since you're already looking at 3309(which I found impossible to locate through normal retailers) I'm assuming it specs T-IV. If so, there's used UOA's, and maybe even a VOA, that may make up your mind on fluid change intervals regardless of what dealer or manual says, just search. If it's T-IV, I'd start thinking about freshening up that fluid pretty soon.
 
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30k is about the limit for ANY ATF. 50k is if vehicle is very gently driven. To go longer, you need inline filtration, sometimes additional cooling, and a UOA to prove that the ATF is suitable for continued usage. Any of the universal or multi-vehicle ATFs that mention 3309/TIV can be used. Plenty of good choices.
 

JeepRubicon2k3

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The owners manual states JWS 3309 in the trans with no change interval recommendations. Do I need to drop the pan to do this like the olden days or is that just a waste of time because I do not have a flusher.
 
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There is NO pan to drop. 3309 is the same as T-IV and I buy it at Toyota for ~ $5.xx per quart. The Mazda CX7 uses the same 6spd AT and I did a plug drain & refill at ~ 30,000 but, the fluid looked new. Refill was ~ 3.75 quarts. I think a 50K plug drain and refill is more than adequate unless you are really abusing it.
 
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