Hello, my names Colton, im 17 and just got a 98 Durango SLT. I'm planning on doing some mods to it, lowered with some suspension upgrades and hopefully a twin turbo set up. The only question i have right now is whats the difference between my truck in 4HI and an R/T in AWD? I want to convert mine to AWD, but i don't understand the difference. I know its a different transfer case, but I know the front diff doesn't lock so why does the r/t have AWD and 4HI?