2011 Silverado 2500 trans cooler
Has anyone upgraded this or did you find it adequate for cooling when towing? I'm picking up a 2011 6.0 today that has the heavy tow package and HD cooler. My 2006 Yukon XL 2500 will stay as it's very...
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A good friend of mine is a transmission validation engineer at GM. When he was first hired, his first platform/project was the validation of the 6L80/6L90. I queried him about transmission temps because I was towing out in the Rockies, and I was seeing temps as high as 235°.
He assured me that they did much worse to these trucks in validation than I could ever do, and that the stock cooler is more than adequate for the job. The "transmission hot, idle engine" message only comes on at 265°. Dex 6 is really that good. I have no plans to upgrade the transmission cooler.
Having upgraded trailers (again), we saw even higher temps in our trip out west a few months ago. I was not concerned at all. The truck has 170,000 miles on it, still runs/shifts perfectly, and I beat the snot out of it. This pic is while we were ascending towards Powder River Pass, elevation 9666':
He assured me that they did much worse to these trucks in validation than I could ever do, and that the stock cooler is more than adequate for the job. The "transmission hot, idle engine" message only comes on at 265°. Dex 6 is really that good. I have no plans to upgrade the transmission cooler.
Having upgraded trailers (again), we saw even higher temps in our trip out west a few months ago. I was not concerned at all. The truck has 170,000 miles on it, still runs/shifts perfectly, and I beat the snot out of it. This pic is while we were ascending towards Powder River Pass, elevation 9666':
