Ranger 2spd mounted in front of NP540 (I can split all gears including reverse)
Turbo: Air Research T04B80
8 lbs Boost @ 65mph on level ground no load
During a trip to the Oregon coast last summer with this truck and an 11-½' camper, at a gross weight of 12,000 lbs, we traveled 454 miles and saw 16 MPG. With the 2-spd I can keep my rpm's within a 500 rpm window. I normally upshift at 2300, which drops the engine rpm down to 1800. 2000 rpm in 4th-over equals 60 mph. All this is with 4:10's , Ranger 2spd 22% OD and 235/85R16 tires.