Normal Transmission Temperature?
I own a 2004 2500HD Silverado with the 6.0 gas engine. They must have run out of the correct instrument clusters while mine was on the line, so I was blessed with a transmission temperature dummy lig...
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With my Duramax the trans temp is at least 60 degrees above the ambient air temperature when it peaks. As others have mentioned when the outside air temperature is higher the cooler on the transmission will be less effective and the ATF will be hotter. Same thing with higher elevations where there is less air. The flash point for ATF is over 350 degrees so that is not a concern.
I do check to be sure the ATF level is correct after a fluid change. When I got my truck new from the dealer the prep person had under filled the ATF and I needed to add nearly a pint. I had trouble getting the ATF up to 160 degrees to do the fluid level check as recommended by GM which says to check the level with the ATF between 160 and 200 degrees, or "normal operating temperature".
I do check to be sure the ATF level is correct after a fluid change. When I got my truck new from the dealer the prep person had under filled the ATF and I needed to add nearly a pint. I had trouble getting the ATF up to 160 degrees to do the fluid level check as recommended by GM which says to check the level with the ATF between 160 and 200 degrees, or "normal operating temperature".
