Portal axles aren’t just for Unimogs. Old Volkswagen swing-axle models had their own version called drop boxes or reduction boxes. They bolt onto the end of the axle and use a gear set to lower the wheel hub while lifting the whole vehicle. You get extra ground clearance without bigger tires and a built-in torque multiplier for slow crawling. VW guys used these to turn stock bugs and buses into trail rigs long before portal hubs became popular. Simple mechanical trick with a big payoff off road.