F-250 has a 2 spd transfer case. Spin the knob to 4H, stop, Neutral, spin to 4L and you're in 4L until you stop, N, 4H again.
Low range and 1st gear is a "crawler". Probably 3MPH tops gets you close to redlining the diesel, I suppose the gasser w/more RPM available would get close to 5MPH. When you switch into 4 Low, the transmission will always want to start out in 2nd, you have to select 1st manually, it's that "creepy" low.
No Hi/low range without using the transfer case.
1st gear in 2wd/4Hi is 3.97:1.
Last edited by horse1; 02/01/15.
