And I agree with king03LS. I wouldn't tow anything with the LS. Unless it was something small aka a crotch rocket or a jet ski. Although I wouldn't use the LS to actually land the jet ski.
I don't think I would even tow that. You can rent trailers from Uhaul for stuff lke that. Don't ruin your car. My friends Dad used to tow his boat with a Camry, that didn't last long at all.
Think about it, the car has a full frame and is nearly 4000lbs, so it certainly weighs enough, and the 5r55 trans in the LS is very similar to the one found in the explorer.
The LS has a uni-body, not a frame.