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Transmission temp to hot?

Transmission temp to hot?

Postby tombo [OP] » May 07 2012, 3:01am

I have a 2012 Silverado 1/2 ton with the 6 speed. What is the max temp on the transmission before I need to worry?
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Re: Transmission temp to hot?

Postby robhanna » May 07 2012, 3:05am

Here's a response from another site, but it is verified.

In the February 2011 issue of Trailer Life magazine RV Clinic in response to a reader about the maximum transmission temperature allowed in a 2009 Chevy Silverado, the Tech Team had this response.

“General Motors’ in-house towing team expert provided RV Clinic with this statement: The maximum allowable automatic transmission fluid temperature is dictated by the transmission oil itself. The oil begins to degrade significantly above 270 degrees Fahrenheit, so we design vehicles so that in all but the most extreme conditions, the fluid temperature in the transmission sump stays below 270 degrees F.

We allow for up to 285 degrees F in extreme conditions (i.e. towing a trailer with combination loaded at GCWR in Death Valley). But for customer usage anywhere else in the country, even at GCWR, transmission sump temperature should stay well below 270 degrees F. Above this point, certain internal components, such as seals, begin to disintegrate rather quickly. Although newer synthetic fluids can withstand higher temperatures we still recommend this (270F) as a maximum temperature. "

Hope this helps.
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Re: Transmission temp to hot?

Postby tombo [OP] » May 07 2012, 3:06am

Excellent information! Thank you.
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Re: Transmission temp to hot?

Postby Willfull04 » May 07 2012, 3:14am

Cant ask for a better answer than that!
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Transmission temp to hot?

Postby Machster69 » May 07 2012, 3:30am

Very nice answer! Now ima try to give specs if i get them right from memory, i think i got this from Z15 but idk a google will prally being this up but, for ever 25 degrees over 195 you lose 50% of the rated life, so another 25% puts you at 25% rated life(.50x.50)

So oil @ 245(195+25+25) will run at that temp for 25% of the rated life(100k x .25) 25kmiles at 245...
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Re: Transmission temp to hot?

Postby Z15 » May 07 2012, 4:10am

This will protect your transmission from the heat.

EXCEPTIONAL HOT- AND COLD-TEMPERATURE PERFORMANCE
Thermal Stability – Hot temperatures are no excuse for poor reliability. Naturally heat-resistant and heavily fortified with anti-oxidants, AMSOIL Synthetic Fuel Efficient Automatic Transmission Fluid exceeds the most demanding oxidation requirements. It delivers outstanding protection against sludge and varnish deposits that clog narrow oil passages and contribute to clutch glazing. AMSOIL Fuel Efficient ATF protects hot-running transmissions.

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Re: Transmission temp to hot?

Postby CKNSLS » Jul 07 2014, 5:10am

Machster69 wrote:Very nice answer! Now ima try to give specs if i get them right from memory, i think i got this from Z15 but idk a google will prally being this up but, for ever 25 degrees over 195 you lose 50% of the rated life, so another 25% puts you at 25% rated life(.50x.50)

So oil @ 245(195+25+25) will run at that temp for 25% of the rated life(100k x .25) 25kmiles at 245...



This is from a chart that is over twenty years old......


It was wrong then BTW.
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