- When you need more torque (power) for heavy pulling at slow speeds.
- When you're climbing steep grades at slow speeds and need extra power.
- When you're descending steep hills with a heavy load-the low gearing provides engine braking assistance.
- Don't use 4LO to get unstuck in mud and snow.
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Regarding this, is it bad to drive in auto 4wd?
Re: 4WD Auto Using Auto 4wd will not hurt anything. It is there and available if the truck detects wheel slippage. But, the hubs are free, so it's not putting extra load on your transfer case. You don't want to use 4wd high for long distances on dry pavement.
Also, is it better to drive in 2wd or auto? Basically, 2WD for everyday driving, Auto when the road surface conditions vary, 4HI for snow or ice covered roads and some off road, and 4LO for off road only.
Just so, what does auto 4 wheel drive do?
Automatic 4WD is a full-time system that lets the vehicle operate in 2WD (either front or rear) until the system judges that 4WD or AWD is needed. It then automatically routes power to all four wheels, varying the ratio between front and rear axles as necessary.
What happens if you drive in 4 wheel drive on dry pavement?
Driving a part-time 4WD system on dry pavement can break the front axles, shear the differential gears and even break apart the differential case. As soon as you hit dry pavement, shift back into 2WD.