F250 6.2 gas Towing heavy with 3.73 rear ??
Looking at a mid profile 5th wheel: Trailer: -36 ft. -Unloaded 10,000 lbs -GVWR for Trailer 12,255 -Pin weight 1,800 unloaded Truck: -6.2 with 3.73 -12,400 limit for 5th wheel -p...
Forum Discussion
Learjet wrote:
having this discussion on another forum..
about 3:73 vs. 4:30 rear gears for the Modern Super Duty Gas engines...this is a 6 speed tranny with 5 and 6 being over-drive gears.
"But... once operating in a transmission over-drive gear,either 5 or 6, the torque is not magically produce by the 4:30 rear gears...right?
example:
3:73 gears, 5th (1st over drive from transmission) engine operating at 2200 rpm = X torque at wheels
4:30 gears, 6th (2nd over drive from transmission) engine operating at 2200 rpm = X torque at wheels.
in this case X should be equal? "
What say you?
5th is 0.86:1 so 3.73 in 5th is 3.21:1
6th is 0.67:1 so 4.30 in 6th is 2.89:1
The 3.73 in 5th will put more torque to the wheels at 2200 rpm, but it will also be travelling slower.
