Help on Rubicon FT4WD option needed even after hours of searching!

[Steve JLUR]

The clutch must be acting as a diff then...otherwise you would get crazy tire scrub and it wouldn't want to turn?

You can’t lock the f&r diffs in 4 auto. The distribution is only front and rear open diff.

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[Reinen]

The clutch must be acting as a diff then...otherwise you would get crazy tire scrub and it wouldn't want to turn?

The clutch is acting like a clutch. You don't get crazy tire scrub because you're in 2WD. The clutch only engages and activates 4WD when the rear tires slip. It's reactionary. There won't be crazy tire scrub because your rear tires are already slipping. If the tires regain traction, the clutch disengages and you're back to 2WD before tire scrub occurs.

Think of 4WD Auto as a fast reacting light switch between 2WD and 4WD. It only has 2 modes, 100% to rear (2WD) or 50/50 front & rear (4WD). The center diff of AWD is more like a dimmer switch, smoothly transitioning power between the front and rear. However the power takes the path of least resistance. So it can't force a 50/50 split like 4WD does. On snowy pavement, the AWD approach is better. Off-road, it's not.