I emailed Auburn, and this is what they said:
The clutches ultimately provide the locking action. However, unlike
limited-slip clutches, the wear is minimal since limited-slip clutch wear
really occurs with high-speed clutch slippage. When properly used, the
clutches in the ECTED will not be subjected to high-speed clutch
slippage since it can be locked in when in demanding traction situations.
Through the years of testing and development, clutch wear has not been an
issue. We do, however, offer replacement clutches if needed.
So it sounds like if you lock it, and dont let the tires spin, the cluthces should be fine. Makes sense becasue clutches only wear when they are spinning at different speeds. So in the front, it will only be used while in 4WD, so clutch wear shouldnt be much of an issue. I just wish there was someone who has used it for 50,000 miles, and can agree.
Red 03 TJ sport l OME lift l ARB's front & rear l 4.11 gears l 32X11.50" MTR's l Nth Degree Tummy Tucker l SYE & CV l Nth Degree Dana 44 slider l Nth Degree Oil Pan Skid l JKS adjustable front track bar l KC slimlights l Rock Rails l IPF H4 headlights l Dynamat