[WARBO]

mainly the car is front wheel drive but has an extra right angle bevel gear box to which the prop shaft is attached, this free wheels all the time and at the rear the prop is connected to the DEM electronic unit. if the cars anti skid systems detect loss of front wheel traction the DEM pressure pump activates ( this is happening all the time on the fly) the wet clutch and provides drive to the rear diff/wheels. Common issue is the bevel gear drive sleeve teeth wear away inside the box and the prop dont spin or the DEM pump or elec box fails and never activates the DEM wet clutch. Front wheel spin indicates either, though a DEM failure would normally include an AWD failure warning on the dash, bevel gear rarely does as being a mechanical issue the car is not "aware" the prop aint spinning as such.