10R80 hesitation at 230F

Discussion in 'Transmission & Drivetrain' started by Flyhalf, Apr 18, 2019.

  1. Cobra Jet

    Cobra Jet Well-Known Member

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    Did the shop determine that by way of stored codes, data logging during test drive or abnormal trans fluid color?

    Keep us posted.

    Where you experiencing any other abnormalities when driving the car off-track under ‘normal’ conditions?
     
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    Flyhalf

    Flyhalf Well-Known Member

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    I did have some little miss shifting (or hesitation between NEUTRAL and D) but i thought was kind of normal. Very rare tho .
    Nothing else .
    My believe is although those trans put the yellow line of the gauge around 255 they cannot go anywhere above 230 cause clutches will start to have issues.
    Apperently heat in the 10r80 is a worse enemy than 6r80
     
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    Flyhalf

    Flyhalf Well-Known Member

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    New update. New Transmission just arrived new info soon :)
     
  4. jasonstang

    jasonstang Well-Known Member

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    Does sound like a clutch slip.
    Kinda weird that the TCM would even allow that.
    There should be torque management to limit the amount of torque during shifting.
    Something is not right.
     
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  5. lil'Zeus

    lil'Zeus Well-Known Member

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    I just ordered my parts today to piece together a tranny cooler set up to piggy back the factory cooler. I hope to start on it next week and see how far we get. I'll keep you in the loop as I know we have been discussing this.
     
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    Flyhalf

    Flyhalf Well-Known Member

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    Sure thing.
    New Trans arrived put the car on tomorrow expecting thursday night or friday morning ..then with cortex for figure out the best cooler. The first who knows call the other
     
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  7. lil'Zeus

    lil'Zeus Well-Known Member

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    I have a plan so we shall see how it works. I'll PM you pics as I'm working on it.
     
  8. Racerbox77

    Racerbox77 Well-Known Member

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    Is the new or rebuilt trans holding up to HPDE with the added cooler?
     
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    Flyhalf

    Flyhalf Well-Known Member

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    The cooler 25 rows does an excellent job maintaining the temp below 220 with 104f outside. I still believe if we can remove the body valve that opens at 190f we will fix all the issue( there is a guy doing it in arizona for the 6r80..)

    Problem is
    this huge cooler with the oil cooler trasmits too much heat at the radiator (mishi bigger one) overheating at 245f the engine.
    So now I did ducts and water spray system :)
    Testing it saturday at chuckwalla with 90f
     
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    Flyhalf

    Flyhalf Well-Known Member

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    Some pics
    Notice the spray on the trans and the oil cooler. Also 2 on radiator 20191008_105606.jpg 20191008_105559.jpg 20191008_105555_HDR.jpg
     
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  11. Racerbox77

    Racerbox77 Well-Known Member

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    How'd it do?
     
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    Flyhalf

    Flyhalf Well-Known Member

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    #27 Flyhalf, Oct 21, 2019
    Last edited: Oct 21, 2019
    For those of you who is following my temps issues. Here an update with the 3 modifications i did
    1. Wickers on hood vents
    2. Boxing and ducting
    3. Water spray
    Update on temps

    Oil engine
    From 285F to 240max

    Trans temp
    From 225 to 210

    Engine
    From 245 to 225

    3rd session with 88f
    I tried not to spray. Max oil temp 260. (REAL GAUGE)
    WITH SPRAY 240
    The system DOES WORK.
    I'm soooooo freaking happy :) although I couldn't concentrate on driving lol i keep watching those temps while driving and get emotional. (I still won though :) )
    I hope they will stay like that.
     
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