4 hi 4 lo wheel drivei put in 4 hi and front wheels arent moveing i put in 4 lo and . . It is usually geared close to or the same as 2WD. . . . Why is there two different options for the 4-wheel drive? Do I use one for . With most conventional 4WD systems you can choose between 2WD (two wheels), 4 HI (High speed 4 Wheel Drive), and 4 LO (Low Speed, High Torque 4 Wheel Drive). Why will your 4 wheel drive hi go in but 4 wheel drive lo will not? Most vehicles need to be stooped and in neutral bef... more