"Jimbote" Are you trying to make a truck that can crawl or one that can have more gear for your turbo upgrade to perform? My truck in 4low 1st gear front hubs unlocked, will sit still spinning both rear tires if i'm on an incline in soft sand with out even applying any throttle. And today it is misty weather out, and i cant drive this truck with out "hot rodding". Today I tried this on semi-wet paved roads. I can be going about 20-25 mph and punch it in 2nd gear and it smokes both rear tires. It even spins them in 3rd gear also. But i'm sure that's all because of the 4.10 and 31 in tall tires.