Why do you believe that is so Dave? Overall weight of the truck? Gearing? Type of transmission?
Hi Joe, as with all complex machines "who really knows".
We thought we would see much better mpg with the new truck. So far
not so. We hit almost 9mpg running 65-67mph. The MB was giving us 8.75.
The DD13 is still not broken in so we hope to see it improve.
As for performance, with the front end being so heavy, 14.5k with the
tag up, we have to run with the tag down, all the time to scale at 12.5k.
The total gross wt of the truck is within a couple hundred of the 2007 Columbia.
So I dont think it is that.
I like the Meritor tran as it shifts much smoother than the 2007( Eton, I think ).
The DD13 just doesnt pull as well as the MB, from 0mph or going up a grade.
Its not horrible just not as strong, more down shifting going up hill. Both are dogs from a stand still, Hinos will kick their butt off the line.
The difference in performance is really minor as the truck gets us where we
are going.
Hope that answered your questions, Joe.