Should be fine, I've had (on different occasions):

24 90lb bags of concrete.
1 yard of wet dirt (rained the day before, put it on the bumpstops, probably well over 2k lbs), twice.
2000+lbs worth of bricks.

Only problems I had with it was clearing the hitch on my parent's steep driveway.

The only difference was this was on my 5.4L F150 with the 9.75" rear end.

 

Just did 22 bundles of roof shingles, 21 sheets in each bundle I think and dammit all, it rode so nice I wanted to keep them in there. She sat a bit lower than level too so I'm figuring 1600 lbs this time maybe, no problemo.

 

22 bundles x 60lbs/bundle=1320lbs approx wt. 2k lbs should be fine though i have had a little over 2 ton in the bed of my 97 for about 15miles and it didnt break any thing, it didnt stop good at all though

 

Make sure you put the rear tires at maximum rated inflation pressure prior to loading or you could have a tire failure.