So....a 20ft trailer w/ a TYM T25 with loader and Rotary cutter is gonna weigh more than 11,000 pounds that my truck is rated to pull?????
Yeah..right
It all depends on how you're truck and trailer are set up, how far you're hauling, and over what kind of terrain. Tow ratings on 1/2 ton trucks are mostly an advertising gimmick. They are based on ideal circumstances with a lot of assumptions on how your tow rig is configured don't take into account real world factors.
I have a 2000 4wd F350 crew cab. A few years ago I was having some problems with the electronics (as it in it would die every 10 min going down the road). Noticing that the newer (ie 2009ish) F150 trucks had a high enough tow rating to pull my 8K travel trailer or my 12k equipment trailer loaded, I reached out to a ford dealership that I actually trusted (I had done construction work for several of them MANY years prior, and they grew up with my folks). I ask them on their opinion and they told me to keep what I have and get it fixed because there wasn't anything on the market in a 1/2 ton configuration that was going to safely pull what I pull. For basic bumper/hitch pull a 1/2 ton will max out at 6,000 lbs. Beyond that requires load distribution and trailer breaks. The issue is 2 fold. What is your rear axle rated for, and how much can your tow vehicle safely stop. To understand what you're rear axle is rated for, you have to take the trailer's loaded tongue weight and do a little bit of math because the hitch is located farther back and acts like a lever. This also assumes that the trailer is loaded correctly. Load distribution helps a lot with here, but those systems are not designed to work when towing over uneven ground (ie off road). Then there's stopping distance. Load distribution helps, and trailer brakes are absolutely required, but a 1/2 ton is still going to struggle to stop a 10K load. When you're running down the highway at 55mph (like anyone drives that slow), and the stop light turns yellow, you have to be able to get your rig stopped before the light turns red and someone pulls out in the intersection. Even when properly configured, a 1/2 ton tow rig isn't going to be able to do that when with 10,000 lbs behind it.
At the end of the day, if you set up your half ton and trailer correctly, you're hauling over relatively level ground (no mountains or steep grades), you're not hauling very far, or very often, then a 1/2 ton can tow quite a bit more than 6K, but YOU have to know, understand, and accept the rigs limitations. If you don't, then rebuilding your transmission is going to be the least of your concerns. If you're in the Midwest and you're going to haul your tractor 10 or 20 miles down the road a few times a month across mostly level ground, you could be okay but it will likely be hard on your transmission. If you're going to run down the road like you're in a 1 ton diesel, and try to haul 10,000 lbs down I75 through Kentucky and Tennessee, damaging your vehicle is going to end up being the least of your concerns.