Thread: Transmission temp,

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  1. #1 Transmission temp, 
    SE Level Member MGRead's Avatar
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    I have a 2004 grand prix GT2 with on a auto transmission. What should the transmission fluid temp be at? avg. outside is 85-92. she been from 210-221 after 35 mins of driving with the a/c running.
    Any help?
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  2. #2 Re: Transmission temp, 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Sounds about right.

    I know my car after long drive periods, it will always stay right at coolant temp, so 195-205.

    04+ cars always seem to run hotter for some reason. Buying a trans cooler can greatly decrease the temps.

    Just to note, any temp above 215-220ish reduces the trans fluid life by alot more than you think. Prolly 10-15k miles.

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  3. #3 Re: Transmission temp, 
    GrandPrix Junkie jteske88's Avatar
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    mine never gets above 210, well not since the first day i had her, she was a little low
    2005 GP GXP-cocor tuned-poly's-lots of sundown
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  4. #4 Re: Transmission temp, 
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    If you plan on keeping the car for a long time, definitely run an efficient double stack cooler (the biggest one you can fit in the grille) or better yet do like I do and run the cooler (S) outside of the radiator-I use dual 18,000 GVW Long double stack coolers. Temp runs about 145 on a 90 degree day-anything over 190 will kill the transmission prematurely! I have zero issues in the extreme cold as well-Just takes the tranny a little longer for the fluid to get hot enough before shifting into 4th (above 88 degrees fluid temp).
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  5. #5  
    SE Level Member MGRead's Avatar
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    I'm looking into replacing my radiator and added a 2 one to the tran. If that dose not help I will be replace my tran with a new one.
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