Like I said my 68rfe with 3.42's in my 2011 HO DRW seemed to run cooler than others and maybe it was because the MagHytec pan or the AMZ/OIL??? Here is proof. This was towing 28-29K combined in SoCal.
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That's the top end of where mine runs. It doesn't matter if I'm running empty or towing 12k pounds, the trans fluctuates between 167 and 172.