I'd like to hear more about this trip.
A few more things have to happen before I can confirm that I can actually do the trip, when they happen I'll open a thread about it. In few words, my plan is to go to Ushuaia (Argentina's most southern city) through Argentina and then come back through Argentina's Route 40, then cross the Andes back to Chile and drive south to Villa O'higgins, the most souther continental town in Chile, then all the way back home to Santiago (where I live). The last time I wanted to do a similar trip a truck totalled my Jeep, two months before january.
More or less like this:
Purple is the the road to Ushuaia, green the road back, red, little side trips. Once un 100% sure it's going to happen, I'll post details of the route.
According to mapsource it's 5500 miles total. Of which 4000 are unpaved, rarely maintained roads.
This is the Chilean Austral road:
And the Argentinean Route 40:
I did a similar trip back in 2000 with my family in our 97 suburban, the Route 40 ate 3 Goodyear tires, our gearbox, and the front differential. I'm 100% confident that the Jeep can take this and much more with proper in route maintenance.