I've heard the VCs can go from anywhere from about 85k on up. It really depends on how the PO(s) drove it. The more the VC heats up, the more power you get at the front axle, until it reaches 50/50. The axles spinning at different rates cause the VC fluid to heat up. Heating the fluid causes the axles to start to lock together. Heating the fluid breaks down the fluid. It's designed to fail. That's why Chrysler switched to the 247 with progressive coupling. From what I understand, that uses clutches and bands. Correct me if I'm wrong there.
01 TJ - 4.0L, NV3550, 2" Skyjacker budget boost, Xenon flat flares, LoD front bumper, Tuff Stuff rear bumper, RH4X4 sliders, 33" STT Pros on 15x8s