What is the difference between 4L and 4H in a 4x4 truck?

Answer 1

There are normally three positions on your 4X4 vehicle's transfer case... 2WD, 4WD Hi and 4WD Lo (some have a neutral position too.)

2WD and 4WD Hi are direct drive, so your engine would run the same speeds in the same gears, while 4WD Lo shifts the transfer case down to a much lower gear ratio in order to provide more engine torque and power to the axles at lower vehicle speeds. 4WD Lo is your "rock crawler" gear. You might also use 4WD Lo if you're pulling a heavy boat out of the water and up a steep launching ramp.

Answer 2

They are two different gears designed to allow the power of 4-wheel drive at high and low RPM (speeds, typicall). You would want to use 4L if you are stuck in the mud, driving slowly over uneven terrain, or otherwise pulling a heavy load. You use 4H for times when you need better traction but you are already driving un uneven terrain (say driving down a long sugar sand road at 30-40mph).

Hope that helps.

Answer 3

4L (4-Low) is for heavy duty pulling. In most 4x4 vehicles you can't go very fast in 4L. Don't try either. You'll mess up the gears.

4H (4-High) is for regular 4 wheel driving like for snow or mud. That's what you want most of the time.

Answer 4

4H stands for Four wheel drive with normal gearing, 4L is 4 wheel drive with the transfer case in low range, meaning very low gearing. Top speed in low range, depending on gearing, is about 45.

Answer 5

4 l = 4 low and this is only to be used at a slow speed for extra tourge= 4 h - 4 high is for everyday driving

Answer 6

Low range and high range. Low gives you more torque and pulling power but not much speed.