Quote:
Originally Posted by Ford_6L_E350
In 4wd tires must slip or you will get severe windup somewhere in the drivetrain.
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I bought a 4X4 Suburban one time from a Survey Company for pennies on the dollar because it would not move in their parking lot. They assumed something was badly broken. Returned that evening to get it with a Floor Jack; and when I jacked up one corner, it unwound the drive train like a wind-up rubber band airplane. Drove it for years with no repairs needed.
4WD should only be used in low traction conditions, like packed snow, gravel roads...
You can use 4WD for short distances in straight lines, like boat ramps, or stump pulling
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The problem comes from turning; inside and outside wheels travel different distances during the turn, thus the need for differentials in the axles. The front and rear axles also travel different distances during the turn, but without a differential in the transfer case, the system winds up and binds - or breaks.