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Transmission temp,

MGRead

MGRead

New member
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?
 


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.
 
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).
 
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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