It either isn't shifting into high gear, or the trans/rear end are geared for that rpm.
3500 miles IS 3500 miles.
You can make the border in about 3500 miles and then travel as much as 900 miles more to reach your destination.
1.609 km ≈ 1 mile ⇒ 3500 km ≈ 3500 ÷ 1.609 miles ≈ 2175 miles
3500 yards = 1.9886 miles
3500 feet = 0.662878788 miles
5280 ft = 1 mile ⇒ 3500 ft = 3500 ÷ 5280 miles = 175/264 miles ≈ 0.663 miles
The 2014 RAM 3500 has a V8 engine.
The 2013 RAM 3500 has a V8 engine.
There are 1.609344 kilometres in one mile. Therefore, 3500 miles is equal to 3500 x 1.609344 = 5632.704 kilometres.
The 2012 RAM 3500 has an inline 6 engine.
The 2011 RAM 3500 has an inline 6 engine.
1 mile = 1.609344 km, so 3500 km = 2174.8 miles.