The phrase "slipping wheel" refers to a situation where a wheel loses traction or grip on the surface it is moving on, causing it to spin or slide without providing proper movement or control. Full definition
This means that the vehicle can be driven with constantly slipping wheels indefinitely. (mechanics.stackexchange.com)
Don't look for a series of locking differentials, like on the G - Class or the almighty Unimog; instead, the traction / stability control system can brake slipping wheels. (automobilemag.com)
The AWD operates via a rear drive module / secondary axle torque transfer device using electro - magnetic actuated primary and secondary clutches, while the system grabs outside slipping wheels for side - to - side torque distribution. (autoweek.com)