Allison’s up-to 2013 do not. Right from trans to the cooler.
While it does not get really cold in PA, I would put on the winter front on Dmaxs when temps dropped below 40.
That would get trans fluid to 110-150 empty or towing less than 10k between a outside temp of -5 to 40.
With the new truck I am also using the winter front and will be installing a revmax bypasss or similar shortly.
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