Why do people only use 4 Hi when offroad except when the vehicle can't pull a hill, then go into 4 Lo? 4 Lo is there for a reason, use it. When I'm offroading, other than a dirt doad, I'm in 4 Lo. Use the torque that you bought. It is much better on the whole powertrain to be easing along in the right gear than lugging along in too high of a gear. This is very important in an automatic. At low RPMs the torque converter can't get enough pressure and lock-up. You will also burn-up clutch packs (yes, automatics have clutch packs) Horse power and torque is in the upper RPM range, not at 1500 RPMs.