Originally Posted by benjeeper
QT I is a viscous coupling type.
Not correct, for the WK2, where there are now three case variations. None of the WK2 cases contain viscous couplings, however. Viscous couplings are for cars. Some WK2 cases use clutch packs (similar to an automatic transmission) instead.
The standard MP2010 QT I transfer case is a simple open center diff type.
The STR-8 MP3010 case, also called QT I, has a clutch pack and computer control.
The optional MP 3023 QT-II case has a clutch pack, computer control, low range, and neutral.
All vehicle have brake traction control.