Ok, it is about axle gearing and I know that alot of sites have lists of what to choose. But all for the USA. Se here goes. I have a 350 engine th700r4 tranny np208 case. I run 35inch tires. The max speed in europe is 80MPH. So I'll be cruzing at 60 to 85 MPH on the highway. So that will be in overdrive. When pulling a trailer in drive I'll be at 50MPH. Still I'll be going offroad as well. To sum it up: OD = 85MPH tops D = 50MPH tops pulling a trailer. Tires are 35" I have 4.11 in a 12bolt now and 3.08 in the front. I want to know if I can best put 4.56 or something in both or put 4.11 in the fron as well. Thanks in advance.