How to Switch Between 4WD and 2WD in an Isuzu Pickup?

[McBentley]

There is a rotary switch on each of the front wheel axles, which serves as the 4WD/2WD switch. To engage 4WD, turn the rotary switch on each front wheel to the ON position. For 2WD, switch it to OFF. When not using the 4WD mode in an Isuzu pickup, set it to LOCK.

[JessicaLee]

When I drove my Isuzu pickup to Tibet before, I frequently switched between 2WD and 4WD. It depends on the specific model. For newer models, there's usually a rotary knob on the center console with positions like 2H, 4H, and 4L. When parked, just step on the brake and turn directly from 2H (rear-wheel drive) to 4H (high-range 4WD) – it provides excellent stability on rainy, snowy, or gravel roads. For steep slopes or muddy terrain, you need to come to a complete stop, shift to neutral, and then turn to 4L (low-range 4WD), which can more than double the torque. Older models have a mechanical lever next to the gear shift – pull it all the way toward you for 4L, halfway for 4H, and push it back for 2H. It's best to wait until the dashboard indicator light stays on before moving; a clicking sound means it's engaged. Remember not to use 4WD on paved roads as it can seriously damage the transfer case.

[LaAustin]

The switching principle actually involves controlling the gear coupling in the transfer case. In Isuzu's electronic switching system, in 2H mode, power is only delivered to the rear axle, which saves fuel and offers flexibility. When you turn the knob to 4H, the electromagnetic multi-plate clutch in the transfer case engages the front axle, achieving four-wheel drive, which is suitable for slippery road conditions at speeds below 80 km/h. Switching to 4L requires shifting to neutral first, waiting for the transmission torque to release, after which the transfer case engages a lower reduction gear set. The tachometer will instantly spike, and the engine delivers significant torque, making it capable of climbing over rock piles. Some off-road enthusiasts disable the ESP in 4L mode, but beginners are advised not to adjust this setting.

[DeArabella]

It depends on what you use your pickup for. If you're hauling cargo on the highway, using 2H all day is the most economical, saving two liters of fuel per 100 kilometers. If you're going fishing by the river on weekends and driving on muddy roads, stop 200 meters ahead and switch to 4H, so all four wheels exert force evenly without slipping. For real off-road adventures, like tackling long steep slopes with cross-axle terrain, you must come to a complete stop at the bottom of the slope, shift to N, and then engage 4L—you'll clearly hear the transfer case 'clunk' into place. When I take my MU-X off-roading, I manually lock the rear differential in 4L mode, though it's unnecessary for daily use. Remember to start slowly after switching to let the driveshaft bear the load evenly.