Sending this power can allow for better use of traction in different situations. Your 4WD setting determines which tires and parts of the truck are receiving the most power. And each 4WD setting has its own purpose and advantages. Most older 4WD must be manually switched between transfer cases, while new 4WD systems have electronic settings that allow you to shift while driving.
It is best to be safe than sorry and i always say, if you have the functionality on your vehicle, use it. Do not try to be macho!!!!
The simple answer here is a definite NO! Please do not do this. The low-range gears are generally used for slow-going, so do not use it for high-speed driving on any surface or highways. In fact, do not use low range at speeds faster than 40 mph as a general rule. With that being said, you will not even be able to travel fast enough to keep up with the slowest highway traffic.
Also, every highway has a minimum legal speed too. Driving in 4th or 5th gear in 4-Lo is like going 3 gears back on your gearbox. For example, in Lo-range, when you are in 3rd gear it is almost the same as being in 1st gear in 4-Hi. And 4th gear in 4-Lo will be like driving in 2nd gear in 4-Hi. So ask yourself if you would drive in 2nd gear on any highway?
I think you know the answer to that question. Apart from the above-mentioned, your risk of causing major damage to the transfer case, gearbox, drive-train, or engine is substantially increased. That is because most vehicles are designed to drive 4-Lo for short periods through difficult terrain or obstacles. Not for overly extended periods at high revs. The rear wheels have more than enough traction to keep you moving in most situations. Should the road get messy, however, you can switch over to 4Hi and that'll give you the ability to travel with greater available levels of traction.
How the four-wheel-drive system reacts depends on where the grip is and how the system shuffles power around. In this example, Engineering Explained host Jason Fenske uses a Nissan Frontier Pro 4X with locking center and rear differentials to show where the power goes in various scenarios.
When you're plowing through some serious stuff, it's time to put the vehicle into 4Lo. In this setting, you are in a slow-speed situation where traction is a priority. A change in gearing sends a lot of torque to the tires and keeps the speeds low. This is to help you get through a section of the road or trail where you might find deep sand, mud, or snow. You can actually see the effect of this extra torque in the video above. Doing mph launches in the Nissan, Jason records his run times and g forces in a variety of driving modes.
And when it does, it'll judder and skid in protest. There are also a few vehicles with a front differential lock, but I'm going to assume that if you bought one of those then you probably know how to use it. Important note: before you go off-road, set your traction control, which likely means disabling it. The button usually has some squiggly lines on it. That's your stability-control-defeat button. Stability control will try to keep your tires from spinning.
If you're on a rocky trail, that can be great—by grabbing the brakes at individual corners, stability control can sometimes mimic the benefits of locking differentials.
We proved that with the Kia Telluride. But if you're in mud, sand, or snow, stability control might get you stuck, even if you've got four-wheel drive. That's because in certain circumstances, you want wheelspin and momentum. Out on the sand, your stability control system will detect wheelspin and cut power to the spinning wheels. Which, in that context, will be all of them. Then you grind to a halt. To turn off the system, you usually hold down the button for at least five seconds.
First the, traction-control system will deactivate sometimes just with a push of a button but you want the whole thing off, so hold down the button until you see a message like "stability-control system disabled.
One more thing: the price of your 4x4 often has a direct correlation to the complexity of its drive systems. And we can't really explain all of them on a case-by-case basis, but if you purchase a machine with overt off-road pretensions, it behooves you to study up on its capabilities.
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