Duramax, Allison, Tow-Haul mode advice
We traded the '05 Tahoe in on a new 2013 GMC Sierra 2500HD crew cab with the Durmax diesel, Allison transmission, and HD tow package. We tow a Surveyor Sport 220 that weighs in about 4,400# dry with a...
Forum Discussion
bgum wrote:
Start engine
Put it in tow/haul
Put it in D
Go
X2. I'm looking for a downside to using T/H.
Other than raising shift points I can't think of one.
OTOH, higher shifts and more converter lockups = less wasted energy, ie less heat in the torque converter. I think this is a GOOD thing.
In fact I often use T/H without the trailer, just to enjoy the downshift/engine braking feature. I can usually get down to a crawl before I have to press the brake pedal to come to a complete stop.
