Bit of clarification - the Hummer and "Humvee" do have portal axles as i just discovered when i looked them up on Wikipedia, the Jeep Cherokee has a live axle similar to the 7/9xx estates and uses the same 1041/1030/1031 diffs as the Volvo.
I suppose i could have crawled under the fence next door and had a look at a Humvee - might have ended up looking at the business end of an M16 instead though!
