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Transmission temperature questions

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Old 09-27-2010, 05:32 PM
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Default Transmission temperature questions

Just installed 2 14400 btu b&m coolers. I still have stock stall. I went driving around for about 30-45min after the car had not been running for 2 days so it was totaly cooled down. Temp got up to 160 sitting in the drive through for 5 min.

Is that temp to high for a stock stall? It was 65f raining today so it wasnt hot.

I am checking my temps with a aeroforce interceptor scan gauge I just got today. What is the temp difference checking trans temps from the computer vs a sensor in the pan?Is it more accurate from the computer?

How many degrees hotter can I expect trans temps to be after I get my 3600-4000 stall?
Old 09-27-2010, 05:35 PM
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Idling you wont see much of a difference in temps. When you start driving around is when your temps will benefit from the cooler. Without it and having an upgraded stall you would fry your tranny relatively quickly. With that cooler driving around you should be around 190-200 degree temps.
Old 09-27-2010, 05:43 PM
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190-200 with 2 14400 btu coolers?! I dont like the sound of that
Old 09-27-2010, 06:50 PM
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This was posted in your other thread


7-Trans temps- This question gets ask a lot. What’s TOO HOT? Well ideally you want you average temp to stay under 190 degrees however I would not get to concerned till the temps get at and or over 230 degrees. Heat can damage a trans but with the exception of extreme heat 250 or higher this damage is a long term killer by breaking down fluid and causing rubber seals to harden and break.
Old 09-27-2010, 06:54 PM
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So anyone know what is more accurate for checking temps computer vs sensor in the pan?
Old 09-27-2010, 08:26 PM
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A sensor in the pan is going to give the best reading
Old 09-27-2010, 09:04 PM
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i used a Compushift controller on my 4L80E, it used the fact. sensor-it seemed to be accurate, read around 160-170 with a high stall conv.
i used the B & M cooler, the one with the 1/2" pipe fittings, mounted under the car at a slight angle-i dont think i ever saw it much over 185
Old 09-27-2010, 09:46 PM
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Originally Posted by senicalj4579
So anyone know what is more accurate for checking temps computer vs sensor in the pan?
The computer reads the factory sensor in the pan.

I have one 14,400 btu cooler and it runs 160 to 175 in 90 degree weather with a 3600 stall speed.
When it was stock it would rarely get above 150.
This is measuring with an aftermarket gauge sender in the line to the cooler and hp tuners reading the stock sensor in the pan.
Old 09-28-2010, 06:08 AM
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If you want to see how good the cooling system is doing, place the temperature gauge in the return line (top line) so that it will monitor the fluid coming from the coolers. This will tell you how good the cooling system is doing. Pan fluid temperature changes are slow to see. If the fluid can be kept at 155F - 180F (except for short periods of high loads) the fluid can last for over a 100K miles.
Old 09-28-2010, 07:07 AM
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I have a 28k cooler. With a Vig2800 the highest temp logged were 179* in summer heat at the track. I now have a circle D 4C and so far the highest I've seen is 182* at the track in summer heat. My radiator trans cooler is bypassed.
Old 09-28-2010, 08:53 PM
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My rule of thumb is fluid temps no higher than 200f in the pan. If your seeing 230-250, its too hot, and you need more cooler capasity/synthetic fluid.




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