Transmission too cold? Is that even possible?

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Originally Posted by pl4yboy

Moving to Laramie... read entire thread.

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excuse me

http://performancetrucks.net/forums/...d.php?t=472891

Too cold is possible just not in SA, TX.

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Originally Posted by GasGuzzler

Too cold is possible just not in SA, TX.

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I was thinking the same thing. The guy with the same thread on PT.net is in Saudi Arabia or some where similar. I don't get worrying about it. Alaska maybe.

I'm only curious about it because my trans used to run at 230 in the summer without the cooler. Now with San Antonio being in the 50's it barely comes off of the 100F mark on the guage unless I'm in traffic then it will rise to 120F.

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Originally Posted by screaminchicken

I'm only curious about it because my trans used to run at 230 in the summer without the cooler. Now with San Antonio being in the 50's it barely comes off of the 100F mark on the guage unless I'm in traffic then it will rise to 120F.

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I worried about it for about 5 minutes. I called FLT and they assured me I had no problems. My trans temps are very similar to yours.

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Originally Posted by zeake

I worried about it for about 5 minutes. I called FLT and they assured me I had no problems. My trans temps are very similar to yours.

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Well all this is good to know. I was just a little uncertain. Thanks to all of you for your input.

230 would scare me. 100 over ambient is a safe max. The only time to worry about over-cooling is in extreme cold where the fluid warms to almost full temp in the trans but is then shocked cold in the cooler, returning way way way less than the core temp of the trans. This is the exact reason GM routes the fluid through the cooler in the radiator even on trucks with an OEM additional cooler. Basically it let's the trans fluid use the engine coolant thermostat so they don't have to put one in the trans fluid circuit.

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Originally Posted by GasGuzzler

230 would scare me. 100 over ambient is a safe max. The only time to worry about over-cooling is in extreme cold where the fluid warms to almost full temp in the trans but is then shocked cold in the cooler, returning way way way less than the core temp of the trans. This is the exact reason GM routes the fluid through the cooler in the radiator even on trucks with an OEM additional cooler. Basically it let's the trans fluid use the engine coolant thermostat so they don't have to put one in the trans fluid circuit.

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Well said, I almost wanted to say the same thing but wasnt sure because If I let my truck sit and idle the coolant temp rises up to 190 or so but the trans temp will stay cool enough that it doesnt move the gauge past 100. If the coolant can work as a thermostat why doesnt it keep the trans fluid almost as warm as the coolant in the same way as it cools it when its hotter than the coolant?

you are fine, 220 is way to warm. I never see anything above 135* with my tru cool 40k even in 100*+ weather. Alot of people over on performancetrucks run the same cooler and see similar temps..