New RAM HD 1000 lb-ft

ksss wrote:
Using your analogy, a 379 compared to a T800 and Western Star or Mack of similar hp and torque running the Ike or some other similar test would provide an idea on towing performance. Comparing a 379 to a class three pickups would be silly. Comparing similiar class 8 trucks to EACH OTHER would provide SOME value. It perhaps would not give all the information a buyer would want but it would be much more information than looking at a spec sheet alone.

Let's do this then. 2 trucks:

- Volvo hwy tractor, with their 625 hp D16 and i-shift, spec'ced as light as it can be (13k front, 38k rear)

- Western Star tridem with double frame, 20k front, 69k rear. Conservative 500 hp ISX, 18spd fuller, say 4.10 rears

Towing the same load, which one will smoke the Ike Gauntlet run? You bet the Volvo would run circles around the heavy spec truck - more power, less weight, less parasitic drag.

Does that mean the Volvo is a better towing platform? No, it's simply faster with a lighter load. But you couldn't hitch up a heavy load and still ensure chassis longevity.

That was my point. The Duramax is the FASTER tower, not better. You and I both know if GM could slap on a 36,000 lbs tow rating the would in a heart beat, for sales.

We also agree it's not the Duramax holding it back, so what is? If not the chassis / axles then what's left, size of the glovebox?