What do you call highway speed. Back in the 50's we drove 3/4 tons 60+ mph all day long. You just have to get used to the noise. The 4.10 gears are getting hard to find and then are very expensive to fix if they need repair. Another option is finding a 55 and up 1/2 ton parts truck and swap both axles and basically you have made a 1/2 ton out of it and have a 3.90 rear.
Last edited by crenwelge; 02/26/2011 8:15 AM.