Kind of went alittle over board the other day loading up a bunch of materials for work. Only had about 50mm clearance under the sump and steering was bloody dodgy. But got it home in one piece. Shitty setup for a work ute have the running gear in the back....
I have done that with my ute a few times. 1tonne patrol. One the weighbridge at Noosa Tip it came in as a 2.2tonne payload.
By that stage it is just driving on the rubber bump stops. Probably not the best thing for the running gear but it did not complain.