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Thread: Trans Fluid

  1. #1
    Registered Member

    Mazda CX-9 Touring

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    Question Trans Fluid

    Hi everyone. I would like to know which trans fluid would you prefer Toyota ATF I-V or JWS 3309. I would like your opinions based on which one is better considering everything including cost. All input is greatly appreciated. Thanks in advance.

  2. #2
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    2012 Mazda CX-9 Grand Touring FWD

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    Six of one, half a dozen of the other.

  3. #3
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    Is that what you did? how did that turn out?

  4. #4
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    What's he's saying is that it's the same thing. JWS 3309 is a spec to which Toyota T-IV conforms. I have used Toyota T-IV numerous times, and it's fine. My local Toyota dealer gives me a discount when I buy a whole case, don't remember the exact price, but I always thought that it was a steal.
    Last edited by just_phil; 04-17-2017 at 02:33 PM.

  5. #5
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    Thanks phil. I will be going with the Toyota one for now. The mazda fluid is way to expensive. For the price of one qt of mazda fluid I can buy 2 quarts of the Toyota T-IV.

  6. #6
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    Mazda CX-9 Grand Touring 2016

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    Check local auto parts stores for Mobil ATF 3309. Same stuff as T-IV. Check even Amazon and eBay.

  7. #7
    Biggie T Skinny helbigtw's Avatar
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    08 CX-9 GT Fwd, Bose/Nav, BSM,Compass/Homelink, Pwr Lift,Tow

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    I have drained and re-filled the trans fluid once so far on my 08, and will be due again this summer. I bought the TIV from a Toyota dealer, got a whole box of it, and returned the bottles I didn't need. It was dirt cheap. I've towed U-Haul 6x12 trailers all over the country and hauled lots of stuff in my CX-9, and the transmission with 95k right now is still strong like bull, no issues. My vote is for the Toyota fluid.


    08' CX-9 GT FWD
    Gray Mica with Black Interior
    Nav/Bose/Sunroof/Bluetooth Phone/Rack&Crossbars/BSM/Pwr Lift/Homelink Mirror/Tow Pkg/All Weather Rear Mats
    K&N drop-in filter/Centric E-Coated rotors & Centric Posi-Quiet Ceramics /Yakima ForkLift Bike Tray / Weathertech front mats
    Tires: Nitto NT850+ CUV
    Oil: Mobile One Full Synth & Mobile One Extended Performance filter
    Problems to date: Blower motor relays replaced once, intake manifold rear brace was missing from factory build, headlamp motors are dying,
    windshield wiper plastic cap broken.
    Mileage: 94k Jan/2017
    Location: Lexington, KY
    Job: Auto Physical Damage Adjuster

    ...

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  8. #8
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    I am leaning toward the Toyota fluid also. How many qts came out when you did a drain and fill? did you do more than one or just the one that you mentioned in your post. The capacity is around 7.5 quarts for the whole system so I am guessing that for 1 drain and fill I would need about 4 qts.

  9. #9
    Biggie T Skinny helbigtw's Avatar
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    08 CX-9 GT Fwd, Bose/Nav, BSM,Compass/Homelink, Pwr Lift,Tow

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    Man it was awhile ago. I don't recall. Just drained, filled. I do remember having to buy a long hose and spout since the fill tube was so recessed.

  10. #10
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    2012 Mazda CX-9 Grand Touring FWD

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    Quote Originally Posted by kornholio View Post
    I am leaning toward the Toyota fluid also. How many qts came out when you did a drain and fill? did you do more than one or just the one that you mentioned in your post. The capacity is around 7.5 quarts for the whole system so I am guessing that for 1 drain and fill I would need about 4 qts.
    You are correct. Drain and fill is about 3.3 quarts so will need 4.

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