I guess I know a little then,
1. the good people at GM that spend millions designing the car rate for 1000# towing "power" as per the manual, but I what would they know, they only Designed the car,
2. T56 is easily rated for over 600# of tq, my setup (FIPK and cutout) puts out just over 350RWTQ or about 415FWTQ, hence its not an auto so it doesn't need a cooler and per manual NEVER needs an oil change (don't worry thats a regular change for me)
3. the diff (while not as good as the ford 12 bolt) will be fine as long as you push over 450RWTQ (although some people were fine around 500 with no complaints)
With that being said ski+trailer is ~350 pounds wet, of which I have 30 pounds on the tongue translating to two regular guys in back seat. So as far as brakes, diff, tranny, engine, shafts (including the aluminum driveshaft in my car) or the whole driveline if you will is concerned, its only two more occupants in the back seats (which in my car are removed). As for the suspension, 30# on the hitch is about 35# in the trunk or 50# in the rear seat which is half of girl. (all from simple trig forces)
Manual rated capacities are also extremely conservative for safety, four pistons up front can stop much more weight quick,
example, my buddy has a GTP and has been towing his twin engine speedster for years which is roughly (with trailer) 2.5 time rated towing capacity and thats with an auto.
Just because you think its wrong, it doesn't mean it is, it just your opinion which is fine as long as you don't enforce it on others.
plus we can talk about during a break from riding on Sat as I hate talking tech through boards (it just takes too long).
Props on how clean you WS6 is, even those Thrusts are shinny, nice choice of colour :beerchug: , mine is not that clean :no:
SORRY EVERYONE FOR THE HIJACK
edit: PS. I even had the pleasure of discussing some of the issues raised here with one of the Engineers that designed the LS1, at the beach none the less with trailer still attached to the car.