I wind 2nd gear all the way up to 60+ MPH. If you aren't winding it out, you aren't using the power it has available.
!st gear is good for a little over 30 MPH, but you can wind it out a little higher if 2nd a too tall for a really steep climb.
For the most part, just mash the pedal to the floor, and let it upshift. Remember those shift points, and those are conservative downshift speeds as well. The PCM won't let you overspeed the motor.
2000 Ford E450 V10 VAN! 450,000+ miles
2014 ORV really big trailer
2015 Ford Focus ST