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Thread: th350 trans w/type f fluid

  1. #1
    Member MASTER JOURNEYMAN
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    th350 trans w/type f fluid

    I bought a th350/10" stall with a mild performance rebuild w/1k on it. The previous owner said he ran type f fluid in it and said he was told that it can withstand the heat better. I have since talked to a few friends who are more involded with domestics than I am and said they have never heard of running type f. Should I continue to use type f in the trans when I install it, or should I drain the trans and converter and swap over to something else? Any suggestions are welcome, thanks guys.

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    Synthetics are the best, they don't break down as fast or foam. For a mild street car I wouldn't worry too much, just make sure you have a good cooler on it.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.

  3. #3
    Senior Member RACING JUNKIE
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    I used to put type F in em all the time when I was a teenager ..makes em shift harder( at least I THOUGHT it did :lol: cause someone told ME that) never hurt mine but they were just street trans stuff

  4. #4
    just run dexron fluid, that trans was designed to run on dexron it will give you the best service. I am a transmission rebuilder by trade. synthetics are sometimes a little too slippery.

  5. #5
    Senior Member MASTER BUILDER
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    I like to run tractor and transmission hydraulic fluid.

  6. #6
    Senior Member RACING JUNKIE
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    Quote Originally Posted by lanham
    I like to run tractor and transmission hydraulic fluid.
    ive heard that on quite a few different boards. must be something to it.

  7. #7
    Member MASTER JOURNEYMAN
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    Thanks guys, is there a certain brand of dextron that is best to use? Sorry if these are useless questions, I have always been a manual trans guy in the past :?

  8. #8
    Junior Member SHOW GUEST
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    Use Type F.

    Type F has a higher viscosity -> better lubrication.
    Type F has higher coefficent of friction -> clutches less likely to slip. (also quicker firmer shifts, not that noticeable).

    Type F is much better for high performance than Dexron.

    If you can afford it, use synthetic.

  9. #9
    Senior Member RACING JUNKIE
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    Quote Originally Posted by dimitar
    Use Type F.

    Type F has a higher viscosity -> better lubrication.
    Type F has higher coefficent of friction -> clutches less likely to slip. (also quicker firmer shifts, not that noticeable).

    Type F is much better for high performance than Dexron.

    If you can afford it, use synthetic.
    \\


    I've heard that too, I've also heard that B/M quickshift is nothing more than type F. Having said that...lol I put mercon in my powerglide, no problems yet. (2 years running)
    I think either type F or dexron/mercon or even tractor hydralic fluids will be fine as long as you buy a name brand, dont get walmart or autozone equate stuff here, pay a few bucks more for the name brands.
    Cp
    ***IN GOD WE TRUST***

  10. #10
    Senior Member MASTER BUILDER
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    tranny fluid

    i agree with dimitar. use type F. i called all the big tranny companies wthat what i use in my drag car and street car with s 350 turbo in it chevy arthen i rebuilt my tranny (hughes, tci ati and they all recommended type F

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