what’s the proper way to use 4×4? with an automatic transmission and switch to engage 4×4 SUV (2H,4H and 4L)

let's say the scenario is here:
– heavy rain
– concrete highway with lot of ascending and descending roads and zigzags

does 4×4 can be applied in kind of scenarios?

am thinking this might help for better traction for wet road.. but what about concrete road and lots of zigzags? does 4×4 can be dangerous to use in zigzag roads?

please advice
the transmission has also an overdrive switch

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2 Responses to what’s the proper way to use 4×4? with an automatic transmission and switch to engage 4×4 SUV (2H,4H and 4L)

  1. chris June 2, 2009 at 7:42 am #

    Use 4Hi for situations where traction is reduced and there is a slight threat to vehicle stability. 4Lo is used when climbing mountains or driving on off-road surfaces. I tend to use my 4WD only when I absolutely need to. I prefer to rely on my driving skills, rather than my truck for safe driving.

  2. K R June 2, 2009 at 7:42 am #

    It's pretty simple and this may even be in the owners manual.

    When the road is dry leave it in 2WD, You will get better mileage and see less wear and tear on drive train.

    In the rain, snow or any slick surface you can put it into 4WD High range. This will give you better traction when accelerating and around curves.

    4WD Low range will only be used if you were off roading or pulling someone else out of a ditch or creeping slowly down a hill and you need engine braking to assist your slow descent.

    If you run 4WD on dry roads you will greatly increase the wear and tear on the drive train and may even bind some parts up. My girlfriend put her stick shift Jeep into 4WD and drove around for days and then she could not get it OUT of 4WD. I took it to a dirt lot and revved up the engine, dumped the clutch which spun all 4 tires and freed up the binding in the differentials – then it could be shifted from 4WD to 2WD.

    Again, check the manual for your specific vehicle but these are pretty good guidelines.