Okay, you have a no-load high of rpm of 2450 (kinda high, in trucks it is usually 2250). Under full load, that 2450 should drop down to 2300 after the allowed 150 rpm governor droop. Governor droop is set by the governor gap, and under full load it goes from .0015 to zero, and all other rack and governor play/settings should be bottomed out. Not the easiest concept to grasp...