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...
Forum Discussion
You likely have GM Dexron III fluid in the transmission. Around 05 GM retired Dex III and replaced it with Dexron VI, which is a full synthetic fluid and backwards compatible with all transmissions that used Dex III. If you drop the pan and change the filter, I would recommend refilling with Dex VI.
DEXRON-VI is a mix of Group II and Group III base oils plus additives. A true synthetic will contain Group IV base oils which are called PAO (polyalphaolefins). TranSynd and the other TES-295 fluids all contain PAO only. Base oils are divided into these groups based on sulfur content, viscosity index, and amount of saturates.
To learn more about Base Oil Groups, go to API.org (American Petroleum Institute).
