4 wheel drive all the time? or just when needed

   / 4 wheel drive all the time? or just when needed #141  
Also guys, keep in mind when you dis-engage 4wd, all of the front components still turn, including the front drive shaft (propeller shaft) Every gear down shaft, bevel gear everything in the front differential and axle shafts ALL keep on turning. ALL of the time. Dis-engaging 4wd doesn't do a thing to keep all of this rolling machinery from moving. There isn't any nice Warn hubs to get out and disengage, or NONE of the automatic or thermo/gas engaging or electrical engaging or disengaging hardware on your CUT to do this.

EVERYTHING keeps moving whether you are in 2WD or 4WD. The only difference is that your front drive shaft is disengaged from the rear differential gear train. But is still turns because the front tires turn, and continues to drive all of this hardware. When you make sharp turns while in 4wd is engaged on a hard surface you will be putting the driveline in a bind because the travel distance of the tires is different. In 2wd, while all the hardware is still turning, but it is disengaged from the rear drive gears they the speeds of the front and rear don't matter and the tire scrubbing and hopping does not occur.
 
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   / 4 wheel drive all the time? or just when needed #142  
EVERYTHING keeps moving whether you are in 2WD or 4WD. The only difference is that your front drive shaft is disengaged from the rear differential gear train.
Well, yeah, but what people care about is the wear on those parts, and gears turning without load don't wear much. It's the engagement and the potential to load big torques on the gears that causes the wear people care about.

Sure, let the gears spin without a load in 2WD. There's practically zero penalty for it.
 
 
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