mixing trans fluid

Discussion in 'Fox 5.0 Mustang Tech' started by I candy, Nov 4, 2009.

  1. I candy Founding Member

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    I have a leak in my trans so i have to top off every once in a while. I'm wondering if its bad to use 2 different brands of fluid. Ya know i buy what ever is cheaper deal cause they all end up on the floor.
    I candy, Nov 4, 2009
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  2. 87GT Drop Top Member

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    No problem with doing that.
    87GT Drop Top, Nov 4, 2009
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  3. bentley429isBAC Active Member

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    Should be fine as long as its the same exact type of fluid
    bentley429isBAC, Nov 4, 2009
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  4. I candy Founding Member

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    so i'm guess i'm a use mercon / dextron III now they got the V i shouldn't use that one right? can't mix the new with the old?

    i'm a keep to the III

    thanks for the help guys.
    I candy, Nov 4, 2009
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  5. 87GT Drop Top Member

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    Stick with Dex/Merc.
    87GT Drop Top, Nov 4, 2009
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  6. Mustang5L5 Founding Member

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    Stick with the III. It's what the trans was designed for.

    At leats go with a name brand like Castrol. I wouldn't stick "Uncle Burts Super A-TEE-EFF" in the trans even if it leaks out in a day or so.
    Mustang5L5, Nov 4, 2009
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  7. I candy Founding Member

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    cool i bought some before from napa but i went to checkers and got some valvoline quarts. going to run that till i save money to have it fixed right. got the dex merc III
    I candy, Nov 5, 2009
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