Definitely legal. Been stopped by dot numerous times and they never unhook anything. Their major concerns are that you are not over tire, axle, or registered weights.
Make sure your truck is registered high enough for the tongue weight. I got an overweight ticket years ago for being over registered weight on my pickup due to tongue weight from a gooseneck. I have seen 3/4 ton trucks with registered weights of 8000lbs. The trucks probably weigh 7000 empty.
Make sure your truck is registered high enough for the tongue weight. I got an overweight ticket years ago for being over registered weight on my pickup due to tongue weight from a gooseneck. I have seen 3/4 ton trucks with registered weights of 8000lbs. The trucks probably weigh 7000 empty.