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Thread: Tranny Oil Cooler

  1. #1
    Ridin Dirty dom's Avatar
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    Tranny Oil Cooler

    I've been considering installing a tranny oil cooler on my 4Runner.

    The trailer I tow gets pretty heavy sometimes and I think it's a lot for my little V6 and tranny.

    Suggestions?

    "Tutto nello Stato, niente al di fuori dello Stato, nulla contro lo Stato "
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  2. #2
    Vulture of The Western World Eric's Avatar
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    Quote Originally Posted by dom View Post
    I've been considering installing a tranny oil cooler on my 4Runner.

    The trailer I tow gets pretty heavy sometimes and I think it's a lot for my little V6 and tranny.

    Suggestions?
    I would.

    I installed one (universal fit) on my TA; plumbed it in series with the factory in-radiator cooler (which is not enough for the hopped-up combo I'm running).

    Check with Summit Racing or JEGS; they sell B&M and TCI coolers to fit just about anything.

  3. #3
    Ridin Dirty dom's Avatar
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    Yeah, I saw a few on there for less than $80.

    When towing my trailer I'm constantly nervous about wearing my unit out.

    "Tutto nello Stato, niente al di fuori dello Stato, nulla contro lo Stato "
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    All within the state, nothing outside the state, nothing against the state.

  4. #4
    Vulture of The Western World Eric's Avatar
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    Quote Originally Posted by dom View Post
    Yeah, I saw a few on there for less than $80.

    When towing my trailer I'm constantly nervous about wearing my unit out.
    I would be, too!

    These mo' fo's (the transmission) can cost $2,000 (vs. the $80 or so for the cooler).

    I think every truck/SUV should come with both HD transmission cooling and a trans. temp. fluid gauge. Some do have 'em (Chevy Silverado 1500) but not all.

    It's a must-have if you are going to tow/do HD stuff...

  5. #5
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    Quote Originally Posted by dom View Post
    .....I'm constantly nervous about wearing my unit out.
    Don't worry about that

  6. #6
    Ridin Dirty dom's Avatar
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    Talking about my tranny unit!

    "Tutto nello Stato, niente al di fuori dello Stato, nulla contro lo Stato "
    -Mussolini
    All within the state, nothing outside the state, nothing against the state.

  7. #7
    Senior Member grouch's Avatar
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    Be sure to run the transmission oil through the radiator cooler first and then through the add on cooler. The radiator will take a lot of heat out and drop it to engine temperature and then the extra cooler will cool it some more. I have had rather iffy radiators where I just bypassed the radiator altogether and just used the cooler by itself. That way, if the internal transmission cooler breaks, it doesn't dump water into the transmission and oil into the water.
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    Quote Originally Posted by dom View Post
    Talking about my tranny unit!
    Maa first preferance be wimmen. But if ya' all dig trannys... fine wid me.

  9. #9
    Ridin Dirty dom's Avatar
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    Quote Originally Posted by dBrong View Post
    Maa first preferance be wimmen. But if ya' all dig trannys... fine wid me.
    Ha, I get it now!

    "Tutto nello Stato, niente al di fuori dello Stato, nulla contro lo Stato "
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  10. #10
    Ridin Dirty dom's Avatar
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    Quote Originally Posted by grouch View Post
    Be sure to run the transmission oil through the radiator cooler first and then through the add on cooler. The radiator will take a lot of heat out and drop it to engine temperature and then the extra cooler will cool it some more. I have had rather iffy radiators where I just bypassed the radiator altogether and just used the cooler by itself. That way, if the internal transmission cooler breaks, it doesn't dump water into the transmission and oil into the water.
    Sounds good.

    I was intending to piggy back on off the radiator.

    On to another question:

    Anyone every try a fluid flush at home?

    When I drop the pan to put a filter on I know only a few quarts will come out, I want to flush the whole deal and I don't want to damage my tranny.

    Ya'll think just cracking a line and letting it bleed in neutral into a bucket will destroy my jankz?

    I'm thinking to do just that.

    I mean I have a buddy with a shop and a BG machine, but sadly I really don't like his shop, or the employees and the hassle to deal with them is too much for me.

    "Tutto nello Stato, niente al di fuori dello Stato, nulla contro lo Stato "
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    All within the state, nothing outside the state, nothing against the state.

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    If you're thinking about a flush of any kind, you might as well replace the transmission and the converter now. It will be a little cheaper when you don't desperately need it.

    Which is to say,
    I don't think running the tranny dry, even in neutral is a good idea.
    and
    The commercial flush machines will just dislodge chips from where they are not doing any harm, and they will re-settle where they _will_ do harm.

    Pull the pan, change the filter, top it up, and don't worry about.
    You _will_ find chips in the pan. Clean the pan and don't worry about it; they've been there since it was new, and didn't do any harm.

    If the fluid is discolored, install a filter in the cooler line and change it a few times.

  12. #12
    Ridin Dirty dom's Avatar
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    There is absolutely nothing wrong with the tranny at all, I've actually flushed it before using a machine. I've always flushed my cars/trucks every 30,000 miles and filters every 60,000 miles and never had a problem in the past.

    Thing now is I don't work at, or have easy access to a shop with a machine.

    "Tutto nello Stato, niente al di fuori dello Stato, nulla contro lo Stato "
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  13. #13
    Senior Member J. ZIMM's Avatar
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    In the past, I've have used an old evaporator out of a car A/C unit. They will handle the pressure, the volume, and are a lot cheaper than most Auto Parts Stores. I have used them under racing conditions WITHOUT going through the radiator. So I didn't need to have a radiator with a cooling tube in it. The A/c unit is a lot bigger than after market units. I have mounted the unit down low, behind, and away from the radiator. The only thing I have done to make it more efficient, is to put an air dam of some type in front of it to create a low pressure area. This helps to draw cooler air through the tranny cooler..I have been using this method for over Fifty Years now.

  14. #14
    Vulture of The Western World Eric's Avatar
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    Quote Originally Posted by dom View Post
    Sounds good.

    I was intending to piggy back on off the radiator.

    On to another question:

    Anyone every try a fluid flush at home?

    When I drop the pan to put a filter on I know only a few quarts will come out, I want to flush the whole deal and I don't want to damage my tranny.

    Ya'll think just cracking a line and letting it bleed in neutral into a bucket will destroy my jankz?

    I'm thinking to do just that.

    I mean I have a buddy with a shop and a BG machine, but sadly I really don't like his shop, or the employees and the hassle to deal with them is too much for me.
    Don't run that thing low, amigo! You'll burn it up...

    There is a safer way.

    Install a drain plug in the pan (very few late model cars come so equipped from the factory).

    Drain the fluid/change the filter.

    Refill and button up.

    Run it for 10 minutes, then drain the pan (without dropping the pan) and replace the fluid one mo' time.

    This will replace most of the fluid.

    If you're really compulsive, you could pull the tranny and drop the converter, then drain it. Most of the remaining juice bees inside the converter....

  15. #15
    Ridin Dirty dom's Avatar
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    Quote Originally Posted by Eric View Post

    If you're really compulsive, you could pull the tranny and drop the converter, then drain it. Most of the remaining juice bees inside the converter....
    LOL Hellz No!

    Think I will be installing a drain plug on it when I do the filter.

    "Tutto nello Stato, niente al di fuori dello Stato, nulla contro lo Stato "
    -Mussolini
    All within the state, nothing outside the state, nothing against the state.

  16. #16
    Senior Member J. ZIMM's Avatar
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    Quote Originally Posted by dom View Post
    LOL Hellz No!

    Think I will be installing a drain plug on it when I do the filter.
    Be careful of what angle to stick that drain plug. Want to try not to go to far below the bottom of the pan. be a bummer to have that silly half inch be taken off by a manhole cover... You also may have that plug welded on by some one that may how to weld different metals that is found on most Tranny's today. Some front wheel drive cars have their pans mounted on the side of the Tranny's. But be sure to watch that angle...

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