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Thread: Transmission Fluid

  1. #1

    Transmission Fluid

    I got a 2002 Galant. The car's been producing a bit of a burning smell lately and the seems to shift a bit off lately, so it seems I need to change the tranny fluid. Does anyone know how much fluid usually drains out if you do a pan drop? I'd just want to purchase the right amount before I go stranding myself. I tried looking around and 6 quarts seemed to be about right, but I just wanted to make sure. Also, do I drop off old tranny fluid in the same place as old oil?

  2. #2
    Experienced TGC Member 02redgalant's Avatar
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    8.5 quarts don't need to drop the pan;remove the radiator transmission cooling line (i believe the return end) and then remove the drain plug on drivers side for the remaining fluid use oem SP3 fluid from the dealer should run you about 50 bucks

  3. #3
    Senior TGC Member DTP's Avatar
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    Do a drain and fill... Flush it basically while you're at it. Only do this if you KNOW the car has had a tranny flush, or your miles are below about 100k or so. Correct me if i'm wron guys.

    However many it takes to drain and fill it two or three times...
    -Andrew

  4. #4
    Yeah took me about 8-9Qts for a drain and refill. You can get rid of the fluid at the recycling center wherever you get rid of your old oil.

  5. #5
    NEVER do just a drain and fill. Problems most often arise when not completely removing any old transmission fluid. A full-flush (using a flush machine) is the most complete method of service for your transmission. See if you leave any old fluid it will have some without any friction modifiers to help the transmission gears and internal valve work properly. Combining new and old fluid may also cause 'frothing' which means this will make your problems worse.

    Completely flushing ALL THE OLD FLUID out and replacing it with factory approved Diamond SPIII transmission fluid is the ONLY way to do this service. Anything else and you risk potential transmission problems.

  6. #6
    Senior TGC Member DTP's Avatar
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    Quote Originally Posted by RedGalant2k1 View Post
    NEVER do just a drain and fill. Problems most often arise when not completely removing any old transmission fluid. A full-flush (using a flush machine) is the most complete method of service for your transmission. See if you leave any old fluid it will have some without any friction modifiers to help the transmission gears and internal valve work properly. Combining new and old fluid may also cause 'frothing' which means this will make your problems worse.

    Completely flushing ALL THE OLD FLUID out and replacing it with factory approved Diamond SPIII transmission fluid is the ONLY way to do this service. Anything else and you risk potential transmission problems.
    Not to start anything, but wouldn't a drain and fill theoretically eventually get all of the "shit" out of the tranny after 2 or 3 DnF? Seems to me that the leftover fluid would eventually get replaced by new fluid when it's rinsed out, per say.

    I had a DnF done on my car 10k ago, with no problems. (Knocks on wood).

    Just going from my experience...
    -Andrew

  7. #7
    Most people do not do a Drain and Refill regularly enough from a brand new Transmission to keep their transmission fluid clean. There are two opinions on the Drain and refill option vs the flush option. Some people on TGC maintain that if you're doing your first flush after 100K on your old fluid, you might end up messing up your interior tranny filter. Others say that they have seen remarkable changes after the flush.

  8. #8
    Senior TGC Member DTP's Avatar
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    I have heard that if the fluid has NEVER been done, that you should just leave it if you're at a certain mileage. I have had 2 shops tell me that one...

    My fluid wasn't that bad when i had it done, so i didn't really worry about it. I had it done the same time i had everything else done.
    -Andrew

  9. #9
    Experienced TGC Member 02redgalant's Avatar
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    Quote Originally Posted by RedGalant2k1 View Post
    NEVER do just a drain and fill. Problems most often arise when not completely removing any old transmission fluid. A full-flush (using a flush machine) is the most complete method of service for your transmission. See if you leave any old fluid it will have some without any friction modifiers to help the transmission gears and internal valve work properly. Combining new and old fluid may also cause 'frothing' which means this will make your problems worse.

    Completely flushing ALL THE OLD FLUID out and replacing it with factory approved Diamond SPIII transmission fluid is the ONLY way to do this service. Anything else and you risk potential transmission problems.
    its really preference if you can flush it then great but if not A Drain and Fill is fine the FSM actually explains how to properly drain and fill and by draining first and filling partially and then removing the return line and running the car you can actually see the color and clarity improvement of the oil as it drains;i've done this 3x now i beat my car everyday lol and im at 140k with no issues
    Last edited by 02redgalant; 03-21-2011 at 11:48 PM

  10. #10
    You are here entirely tooo much!! oakrdrs187's Avatar
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    From our "How many miles" thread.

    Quote Originally Posted by IVORY_G View Post
    A drain and fill is just that, you drain fluid through the drain plug, re-plug it, then fill it back up. A Flush is done with a machine which physically pushes out any debris or gunk with force. This can cause damage to old seals and such which is why its not recommended on vehicles over 100K. Which Ive heard on more than one occassion from Mitsu mechanics and other mechanics. I mean why play "Russian Roulette"?

  11. #11
    I had my a/t a tranny flushed when it was at 77,000 miles. On the same day, as I was crossing a bridge the tranny would not accelerate as normal. Turns out the transmission was stuck in 3rd and would not shift through the gears correctly. Got it rebuilt and eventually went 5spd.

    2001 5 speed 4g64T

  12. #12
    Guys I just went to the dealership to check out Transmission fluid and the guy at services's said that Dexron 3 ATF fluid is the same thing as the Dealer recommended fluid, but just a lot cheaper. I was wondering if any of you guys have had any experience with it.

  13. #13
    Different car companies make different transmissions that require different fluids.
    GM - Dexron
    Ford - Mercon
    Chrysler - ATF +4
    Honda - ATF Z1 or DW1
    Mitsubishi / Hyundai / Kia - ATF SPIII

    and if it is a continuously variable transmission, it's completely different again.

    Using fluid that isn't specced for your car can cause transmission slipping and other problems. I've heard the Chrysler fluid is very grabby and Dexron isn't. Putting Dexron in a Chrysler will cause slippage.

    So I'd say only use fluid that says SPIII on the bottle.

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