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Projects Transmission cooler under car ?

Discussion in 'The Hokey Ass Message Board' started by Rustytoolss, Sep 17, 2013.

  1. Rustytoolss
    Joined: Jul 27, 2009
    Posts: 300

    Rustytoolss
    Member

    I don't have much room for a transmission cooler in front of the radiator. My truck weighs less than 3000 lbs. And has a 727 mopar trans, stock converter. Its a cruiser/driver no heavy usage. Could I locate at LARGE aftermarket trans cooler (say 10x15) under the truck, with out using a fan with it. My radiator DOES NOT HAVE a built in cooler. Thanks
     
  2. tfeverfred
    Joined: Nov 11, 2006
    Posts: 15,791

    tfeverfred
    Member Emeritus

    Just put it where it can get airflow.
     
  3. LongT
    Joined: May 11, 2005
    Posts: 968

    LongT
    Member

  4. SMOG_GUY
    Joined: Jun 28, 2011
    Posts: 388

    SMOG_GUY
    Member
    from Dinuba

    In my avatar it's mounted on the frame near the trans.
    Same deal, light vehicle 727 Torqueflite.
     

  5. 1940Willys
    Joined: Feb 3, 2011
    Posts: 799

    1940Willys
    Member

    I'd also keep in mind, keeping it, and its lines, away from the rear tires.
     
  6. tfeverfred
    Joined: Nov 11, 2006
    Posts: 15,791

    tfeverfred
    Member Emeritus

    I used to use one like that. All it did was save me a foot and a half of transmission line. Other than that, it was worthless. I switched to the finned type with a tube that makes 4 passes.
     
  7. No problem as long as it's mounted where it can get some airflow. HRP
     
  8. Shaggy
    Joined: Mar 6, 2003
    Posts: 5,207

    Shaggy
    Member
    from Sultan, WA

    Or just loop the lines, for what you probably use it for it doesn't need a cooler
     
  9. Some midto late 90s dodge trucks had one under the left side with a cooling fan on it.
     
  10. THE FRENCHTOWN FLYER
    Joined: Jun 6, 2007
    Posts: 5,367

    THE FRENCHTOWN FLYER
    Member
    from FRENCHTOWN

    On my '33 Willys coupe I have a Hayden waffle style trans cooler mounted beside the driveshaft. Yup, I forgot to specify a trans cooler when I ordered my custom radiator. It is adequate for all but the most severe stop-and-go driving conditions (e.g. The Woodward Cruise). I plan to add a small fan ala a bilge fan or a brake duct fan that is fairly cheap. I have used these fans on my race cars with a thermostatic control with great success.
     
  11. tools_set
    Joined: Sep 16, 2013
    Posts: 1

    tools_set
    Member
    from Komi

    [FONT=&quot]no need a cooler? [/FONT]
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  12. mustang6147
    Joined: Feb 26, 2010
    Posts: 1,847

    mustang6147
    Member
    from Kent, Ohio

    A bunch of guys I race with put them under there cars, as far back as the rear wheels.

    I would imagine on the street, you gona need something to any block debri from hitting it...
     
  13. 40FordGuy
    Joined: Mar 24, 2008
    Posts: 2,907

    40FordGuy
    Member

    Under car is ok,...and with a fan added, you're good. About temp,...ATF goes south around 350 degrees, so as long as it remains below that,..ok.

    I ran a temp gauge on a C6, behind a 6.9 diesel. When I changed over to full synthetic ATF, the temp ran 15 degrees cooler.

    4TTUK
     
  14. swifty
    Joined: Dec 25, 2005
    Posts: 2,217

    swifty
    Member

    I used one like LongT posted only a dual pass version 18" long. Car weighs 2860lbs and has 727 with stage 1 convertor. I was doubtful about the cooler so I fitted a temp gauge - rarely gets up to 160. Cooler is on the inside of the frame rail above the exhaust with a heat shield over the exhaust. Done 11k miles no probs.
     
  15. 1971BB427
    Joined: Mar 6, 2010
    Posts: 8,719

    1971BB427
    Member
    from Oregon

    I've had numerous hotrods with the trans cooler under the car, or laying horizontally below the frame. Just sold one this year that I had set up that way for over 30 years with the same trans, and no issues. I've got the same setup on my Austin gasser, as it also is restricted room.
    I do run large coolers, but no fan, and that seems to work fine.
     
  16. vintage6t
    Joined: Jul 30, 2007
    Posts: 373

    vintage6t
    Member
    from CT

    I just installed one of these mounted to my inside frame rail:
    Mr. Gasket 7365G Satin Aluminum Dual Pass Transmission Cooler.

    I like it because both fittings are on the same end, so it makes for a cleaner install. This was cheap too at like $55 on Amazon.
    [​IMG]
    .

    This was to replace another style, also mounted to the frame rail, that had broke loose from its mounting and hit the pavement. Needless to say the puncture and subsequent loss of ATF left me stranded!
     
  17. 57Custom300
    Joined: Aug 21, 2009
    Posts: 1,424

    57Custom300
    Member
    from Arizona

    I recall on some mid 50's Fords after they went from air cooled units the cooler was mounted on the side of the trans.
     
  18. stimpy
    Joined: Apr 16, 2006
    Posts: 3,546

    stimpy

    knew guys in the 70's that ran those on there O/t street/strip cars and never had a issue . just do not paint it leave it raw and unpolished and try to keep it away from the frame about 2" so air can get around all sides of it and run steel lines to and from it to help wick off some heat . you can also look into a small plate style cooler and mount it flat with a fan above blowing the air down , or snipe a plate cooler out of a newer car radiator that has plastic tanks just have to rig some mounts for it , junk yard has hundreds of broken radiators now days to get one , just have to use metric to sae adaptors ) on my race car SS/KA which used a th400 we used a ford powersteering cooler . they are tough as nails as they mount them up front of the motor and in later years on the front of the suspension crossmember ( my frinds O/t car uses one from a 96 explorer )
     
    Last edited: Sep 18, 2013
  19. woodiewagon46
    Joined: Mar 14, 2013
    Posts: 2,269

    woodiewagon46
    Member
    from New York

    I have been using a Setrab cooler I purchased from Godman Performance on my Deuce roadster, 2400 Lbs. 55,000 miles, with no problem. It's mounted on the frame rails under the passenger seat. One thing I did do was fabricate a sheet metal scoop to catch the air.
     
  20. jazz1
    Joined: Apr 30, 2011
    Posts: 1,534

    jazz1
    Member

    I use the same one, same location hooked up to my 700R4,,,checked temp and its good.. 4000 miles to date. Not sure how it would be suitable when towing,,,have not tried yet..
     
  21. Hot Rod Willys
    Joined: Nov 10, 2006
    Posts: 1,700

    Hot Rod Willys
    Member
    from Ohio

    The key to it working is the fact you said a stock converter, with that said you will have no problem mounting a cooler under the car. The more air flow the better but its not going to over heat with a stock converter and normal driving. I can say this because I have done plenty with no issues. Its going to be a lot better than a 180 + degree radiator as a cooler!
     
  22. HOTFR8
    Joined: Nov 30, 2010
    Posts: 2,075

    HOTFR8
    Member

    I have two, one in the chassis rails of my F4 truck and the second connected to that with a fan. Rarely do I need to turn on the one with the fan. Mind you the C6 has a full manual shift kit.

    [​IMG]
    [​IMG]
     
    Last edited: Sep 21, 2013
  23. 50dodge4x4
    Joined: Aug 7, 2004
    Posts: 3,534

    50dodge4x4
    Member

    I ran a steel tube loop (abut 3' long) under a big early 70s Chrysler wagon for a trans cooler for 2-3 years (probably 10,000-15,000 miles) without issues, and I beat the crap out of that car. Those 727s are tough. Gene
     
  24. I fitted this cooler under my 26 rpu for the Powerglide. JW
    [​IMG]
     
  25. OldFord39
    Joined: Aug 23, 2011
    Posts: 64

    OldFord39
    Member
    from Monroe, Wi

    According to ATSG (Automatic transmission service group)the optimum temperature of transmission fluid is 175° for every 10° rise in temperature it cuts the life of the transmission in half if you ran your transmission at 350° as stated in an earlier post you would be rebuilding it about every 500 miles.
     

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