VentureVan wrote:
Not sure what you mean by payload?? :)
And that is exactly your problem. Payload is what your van is carrying which includes people gear, your WDH and tongue weight. Payload WILL be exceeded before reaching your stated tow capacity. Check the sticker on your door jamb and check your gross vehicle rating. Google tells me this number is 5357 for a 2005 Venture. So the total weight of everything in it cannot exceed this weight.
Since your TV was not originally set up with a tow package, it most likely does not have the correct tires and has smaller brakes. Air shocks doe not create payload capacity. Why not post a picture of your doorjamb sticker?
Good luck.