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Thread: 1999 750il : Thinking of adding a transmission cooler...any suggestions

  1. #1
    Join Date
    Jul 2008
    Location
    new york
    Posts
    279
    My Cars
    1999 750il, 1995 325i, 1995 trans am, 1985 corvett

    1999 750il : Thinking of adding a transmission cooler...any suggestions

    Hi guys,

    I was considering adding a tranny cooler since heat is the number one enemy of all transmissions. i believe these cars may already have a factory tranny cooler but i'm not sure.
    I also dont want know i adding an after market tranny cooler may reduce the fluid pressure and cause other issues.
    Does anyone have experience with this situation?
    Thanks for your help

  2. #2
    Join Date
    Nov 2016
    Location
    NY
    Posts
    344
    My Cars
    E38/E39
    Not with an e38. I also have a 750 / 2000, so we are both post facelift. V8 and V12 e38’s have a ‘cooler’ plumbed into the radiator, let’s talk about this here, and see what develops - you are looking to insert a airflow based cooler?

  3. #3
    Join Date
    Jul 2008
    Location
    new york
    Posts
    279
    My Cars
    1999 750il, 1995 325i, 1995 trans am, 1985 corvett
    Hi CPHES....yes I was considering the airflow based coolers but have some concerns about whether its necessary at all on the e38 since I think they have a factory cooler in addition to the radiator cooler.
    What kind of cooler are you considering?

  4. #4
    Join Date
    Nov 2016
    Location
    NY
    Posts
    344
    My Cars
    E38/E39
    Also - as we look to add a cooler, there will be additional ATF needed -

  5. #5
    Join Date
    Feb 2004
    Location
    Redding, CT
    Posts
    379
    My Cars
    '01 740i sport, VW TDI
    Unless you're towing a heavy trailer you don't need anything additional to what came from the factory. Diligence with fluid and filter changes will server you better.

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