graham65 wrote:
4.10 with the cummins 6.7 ?
With a GVW of 19,400#, you could easily hit 4,000# of pin weight. I do 99% of my towing in the mountains of SC, NC, TN, VA and WV. Some 7% grades on some of the Interstates and some much h steeper on the mountainous secondary roads that can be quiet curvy. The Ram in my Sig has the Cummins with Aisin tranny, a medium duty tranny. Truck has a GVWR of 14,000# ,with RAWR of 9,750#. GCWR with 4:10 is 37,500#. You could easily handle a pin weight of 4,000#and you'll come nowhere near trucks GCWR.
My 5er is loaded to 16,200# with a pinweight of 3460#, and I'm still under my trucks GVWR and well under its RAWR. Almost 25,000 miles on it and just had windshield washer motor replaced..truck tows my 5er very easily all through the mountains.
Don't know GCWR and GCWR on an '09 GM/ Chevy 3500 dually, but it's for sure the D/A would have no problems towing that weight.