First trip with the new Rpod. Towing with 2007 Chevy Colorado. 3.7 LTR 5 cyl. have a scan gauge. It would not show trans temp. It does show coolant temp. The coolant temp stayed around 209,211. As it got hilly, and later in the day, the temp rose to 215.Is this too hot? Doo I need additional cooling? Or a tranny cooler?

Transmission temp gauge is a must IMO. My TV's water temp hardly ever goes beyond 210 but tranny temp moves up on grades. Transmissions are expensive so I watch it closely.

No, 215 is not too hot. In fact that is when most fans kick on. Does your truck have a factory tranny cooler? If so, your fine. If not, plan on getting one!

hasheel wrote:First trip with the new Rpod. Towing with 2007 Chevy Colorado. 3.7 LTR 5 cyl. have a scan gauge. It would not show trans temp. It does show coolant temp. The coolant temp stayed around 209,211. As it got hilly, and later in the day, the temp rose to 215.Is this too hot? Doo I need additional cooling? Or a tranny cooler?Ideally you can get a tranny temp gage so you know what is going on in the transmission. If the transmission is getting too hot, the engine can follow it as the main radiator cannot take out enough heat. And if you do not have an aux tranny cooler and you are towing, I would suggest getting one. Hope this helpsJohn

50/50 coolant at 15 psi will not boil until you are above 265-270 degrees.I would run full throttle to 240-250 zone without worry.

Typical, non-synthetic, ATF starts to break down around 260F.Knowing you ATF temp is important. An auxiliary transmission cooler, either factory or aftermarket, should be considered critical.

How hot is too hot | Good Sam Community

15 Replies

theoldwizard1
Explorer II
Apr 20, 2017
Typical, non-synthetic, ATF starts to break down around 260F.

Knowing you ATF temp is important. An auxiliary transmission cooler, either factory or aftermarket, should be considered critical.
time2roll
Nomad
Apr 20, 2017
50/50 coolant at 15 psi will not boil until you are above 265-270 degrees.
I would run full throttle to 240-250 zone without worry.
JBarca
Nomad II
Apr 20, 2017
hasheel wrote:
First trip with the new Rpod. Towing with 2007 Chevy Colorado. 3.7 LTR 5 cyl. have a scan gauge. It would not show trans temp. It does show coolant temp. The coolant temp stayed around 209,211. As it got hilly, and later in the day, the temp rose to 215.
Is this too hot? Doo I need additional cooling? Or a tranny cooler?

Ideally you can get a tranny temp gage so you know what is going on in the transmission. If the transmission is getting too hot, the engine can follow it as the main radiator cannot take out enough heat.

And if you do not have an aux tranny cooler and you are towing, I would suggest getting one.

Hope this helps

John
Turtle_n_Peeps
Explorer
Apr 20, 2017
No, 215 is not too hot. In fact that is when most fans kick on. Does your truck have a factory tranny cooler? If so, your fine. If not, plan on getting one!
Lwiddis
Explorer II
Apr 20, 2017
Transmission temp gauge is a must IMO. My TV's water temp hardly ever goes beyond 210 but tranny temp moves up on grades. Transmissions are expensive so I watch it closely.

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How hot is too hot

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