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  #41  
Old 03-02-2025, 02:33 PM
Schurkey Schurkey is offline
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So they’d be ok with the temps being below 150- assuming you could get it that low?
I wouldn't be. I'd want 170--200-ish. Newer cars go hotter, they don't even turn on the electric cooling fan(s) until 210 or so.

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  #42  
Old 03-02-2025, 05:38 PM
59safaricat 59safaricat is offline
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So they’d be ok with the temps being below 150- assuming you could get it that low?
Mine never gets above 140F bypassing the radiator. I have started and driven it in below zero weather with no problems. If the temps are freezing or cooler, let the trans warm up a few minutes. The engine will need to warm up a few minutes before driving, anyway.

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  #43  
Old 03-02-2025, 06:48 PM
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grivera grivera is offline
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My bird has a 4l80e with a tsp converter, auxiliary trans cooler and the cooler in radiator - stays between 160-190 normally.

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  #44  
Old 03-02-2025, 06:52 PM
ta man ta man is offline
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I wouldn't be. I'd want 170--200-ish. Newer cars go hotter, they don't even turn on the electric cooling fan(s) until 210 or so.
Transmission temps not engine temps.

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  #45  
Old 03-02-2025, 07:41 PM
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turbo69bird turbo69bird is offline
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So they’d be ok with the temps being below 150- assuming you could get it that low?
Heat kills transmissions , cold doesn’t
Why would it?

Trans fluid doesn’t thicken like motor oil.
There’s no reason why a cool (let’s face it we aren’t talking cold at 100 degrees. ) transmission would be hurt by that temp?

When we fly airplanes we wait for 100 degree oil temps to do our run up. 1700 RPM w prop torque on it. And that’s an engine with aircraft oil in it .

Keep in mind these airplane engine max RPM is 2600 drop dead max.

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  #46  
Old 03-02-2025, 07:53 PM
Schurkey Schurkey is offline
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Transmission temps not engine temps.
Yes. Transmission fluid in the pan at 170--200 ish. Newer vehicles can be warmer than that, since the radiator isn't fan-cooled until 210 or so, so even the "cool" tank of the radiator--where the trans cooler lives--is going to be plenty warm.

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  #47  
Old 03-03-2025, 08:10 AM
ta man ta man is offline
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Yes. Transmission fluid in the pan at 170--200 ish. Newer vehicles can be warmer than that, since the radiator isn't fan-cooled until 210 or so, so even the "cool" tank of the radiator--where the trans cooler lives--is going to be plenty warm.
My 2019 GMC trans fluid never gets that hot even when towing.

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