Hauled just over 6 Tons this weekend with my new (To me) 05 Duramax/ Allison! 128 RR Ties & a 3500lb Utility Trailer. I love this truck! I hit 45mph before I had to shut it down for the corner. The grade is about 20% and a quarter mile before the hairpin turn.
My Old Turbo IDI Ford could only do 55 empty before the hairpin turn.