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Thread: ✚ EASY CVT Transmission Oil Change

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    Lightbulb ✚ EASY CVT Transmission Oil Change

    Hello fellow Mirage owners,

    I wanted to give something back to the forum for the help that I have received.

    Mitsubishi recommends changing the CVT transmission oil at 30K and again at 50K.

    I found a way to change out almost 3 quarts of the 7.4 quart capacity of the CVT very fast, and pretty cheap.

    This method does not require removing the pan or putting the car on an incline.

    Step one is getting a Hobbico Hand Crank Fuel Pump. These pumps are made to pump fuel for RC aircraft and cars.

    You can find these pumps on eBay or Amazon for around $22 shipped.


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    Next, I went to Lowe's Hardware Store and bought about 6 feet of tubing that fit snugly into the In / Out ports of the pump.


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    Next, Put one end of Tube from the pump down into the transmission dipstick tube until it hits bottom, and then put the other tube from the pump into a measuring collection container.

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    Now, start slowly cranking the pump about one revolution every three seconds.

    When fluid reaches the pump, the cranking resistance will go up, but the pump can handle it as long as you pump slowly.


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    It will take about two or three minutes to pump a quart. -- Not too bad.

    When all fluid is pumped out of the CVT, (I was able to pump out almost 3 quarts, in fact 200ML shy of 3 quarts),

    Then just start reversing the pumping, with the exact amount of good fluid going back into the CVT.

    This pump works forward and reverse.


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    This entire process took about fifteen minutes, with no messes, and no getting under the car. YEE HAW !!!! -- I plan on doing this process every 20K miles from now on.

    Hope this helps others.




  2. The Following 4 Users Say Thank You to jimmy409 For This Useful Post:

    craigq (11-01-2018),Daox (11-02-2018),MetroMPG (11-02-2018),Top_Fuel (11-02-2018)

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    I've got a Pela fluid extractor from my VW days, will be using this method.
    2018 Mirage

        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage GT 1.2 automatic: 38.0 mpg (US) ... 16.1 km/L ... 6.2 L/100 km ... 45.6 mpg (Imp)


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    jimmy409 (11-04-2018)

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    Great idea jimmy409. Thanks for sharing it, and including pictures too.

    Where did you get the idea to use this pump?

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.8 mpg (US) ... 21.2 km/L ... 4.7 L/100 km ... 59.8 mpg (Imp)


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    Thank you Eggman.

    Well, after reading all the other posts about how to change the fluid, I knew I wanted an easier way.

    A buddy of mine flys RC helicopters, I went out to see him fly one day and noticed the fuel pump that he was using.

    I asked him if he thought the pump could handle transmission fluid. He said he didn't know, but his pump has been working flawlessly pumping Nitro Fuel for the past 8 years.

    I decided to give the pump a shot.

    To my surprise, this pumps works better than I thought. It's very durable, and I'm sure it will out-last the life of my Mirage as long as I don't abuse it by pumping too fast.

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    Administrator Daox's Avatar
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    Great post Jimmy! I've added it to our Mods & DIY list for easy future reference.
    Custom Mirage products: Cruise control kit, Glove box light, MAF sensor housing, Rear sway bar, Upper grill block

    Current project: DIY Nitrous oxide setup for ~$100

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage DE 1.2 manual: 45.4 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.6 mpg (Imp)


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    jimmy409 (11-04-2018)

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    Do you think that if you pumped first, and then removed the drain plug, you would get any more out?
    I'm looking for a more convenient way than the 3x partial-change method.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage ES 1.2 automatic: 36.9 mpg (US) ... 15.7 km/L ... 6.4 L/100 km ... 44.3 mpg (Imp)


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    Quote Originally Posted by Tyrelirwin View Post
    Do you think that if you pumped first, and then removed the drain plug, you would get any more out?
    I'm looking for a more convenient way than the 3x partial-change method.
    Replace the CVT drain plug with a Fumoto valve with the nipple and you can drain the pan with no muss, no fuss. Only need to make a mess once when you remove the OEM plug to drain and replace it with the Fumoto.

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 automatic: 40.6 mpg (US) ... 17.3 km/L ... 5.8 L/100 km ... 48.7 mpg (Imp)


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    Hi Tyrelirwin,

    I don't think that would work because the rest of the fluid is deep inside the CVT, only a professional flush would get it all out.
    And, I do not have much faith in professional flushes.

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    Tyrelirwin (11-03-2018)

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    Quote Originally Posted by jimmy409 View Post
    And, I do not have much faith in professional flushes.
    Man, do I feel that!

    My understanding is that the rest of the fluid is in the torque converter? I'm assuming you would need pressure or vacuum to get the rest out? I just hate the inefficiency of 'drain and fill'. By my math, after doing it 3 times you still only have 75% of the fluid changed.

        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage ES 1.2 automatic: 36.9 mpg (US) ... 15.7 km/L ... 6.4 L/100 km ... 44.3 mpg (Imp)


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    It seems it would take 6 flushes of 2.5L each time to get 93% of the fluid changed. Thats 15L


        __________________________________________

        click to view fuel log View my fuel log 2014 Mirage ES 1.2 automatic: 36.9 mpg (US) ... 15.7 km/L ... 6.4 L/100 km ... 44.3 mpg (Imp)


  15. The Following User Says Thank You to Tyrelirwin For This Useful Post:

    jimmy409 (11-04-2018)

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