April without, August with E-diff

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Originally Posted by Leo

Been told by a LR bod that it does lock 100% in some conditions - of course it can lock and unlock several times a second and different TR modes put the diffs into different levels of pre-lock.

Theoretically, of course, you are right, any clutch has the potential to slip, but the forces involved would be huge.

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I think CL's post rings true, I know it's a clutch in there (as opposed to a pinion or other device to mechanically lock it) which is why it can be (de)activated so quickly. Mechancial devices may need a slight rotation to align cogs or what-not, and are sensitive to torque input when (dis)engaging. So if it is a clutch then it won't be 100% in theory, but in practice I very much doubt you'd be able to slip it, something would probably break first.

An interesting question; is the clutch either 0 or 100, or is there an in between setting. I suspect it is 0-100 and ETC takes care of any interim values, with ETC dropping out when the clutch goes to 100. Still works on the front unlike Toyota and Mitus's implementations.

Definitely a variable degree of locking. The actuator operates against a sloping surface to be able to apply a precise amount of force to the plates. The motor has to be calibrated if its removed to ensure the correct amount of force is applied.

As for always being able to force movement, brakes operate by clamping forces and therefore can always theoretically be unlocked with enough force but in practice its impossible due to insufficient tyre grip.

haven't done any real rock crawling yet but found some deep mud in central QLD in Dec/Jan and never looked like getting stuck and I don't have the e-diff.

The locker is of most use on hills and on rocks and least use on sand and shallow mud.