No it will not void your warranty. The Landmark Augusta we had came with the Trailair pin box. As KaKamper said the Trailair pin box on helps with the up and down movement and in my opinion does take some stress off the frame. I agree the Tri-glide would help with side to side front to rear movement. We have a standard pin box, however we do have the Trailer Saver Air ride 5th wheel hitch and we have no chucking at all. The Trailer Saver is pricey, but you can't buy a better air ride hitch. And it would be the last hitch you would have to buy. As the name says Trailer Saver and it does just that. GBY.....