blt2ski wrote:
It might not be just speed too. The minimum grade % a rig can go up before stalling out is 12%. Not sure how many 12+% grades I'll go up today, but that grade is 3% lower than a class 8 uses for OTR work. 8% less than minimum for LDT work. 30% less than rigs potentially used off road, like dump and cement trucks.
The ratings are horribly low from my perspective.
OR, their needs to be more than one tow rating for a given rig, depending upon usage. OR a way for one to know how to derate the max rating, based on ones personal performance standards. Which is what a tow rating is. A performance standard.
Marty
I know Ford actually does this (or at least used to before J2807) and it was in the owners manual or towing guide where most owners do not look. The max towing rating would decrease a certain percentage depending elevation and the frontal area size of what you were towing.
Although what I find funny is that I have seen many claim BS on lower towing numbers back before J2807 when each manufacture had their own standard. Now they are posting higher numbers with the J2807 standard and everyone thinks it is fine. In many cases, J2807 lowered the standards just so they can post higher numbers in advertising.
