Thor's hitch ratings are usually 8k lbs but that may not be how much you can tow. You'll need to get the coach weighed and subtract that from the GCWR to get how much you can tow.
Yeah the 2021 34j has an 8000 lb hitch (
https://www.thormotorcoach.com/hurricane/specs/) and a 26,000 lb GCWR. You can get your coach weighed at a
Cat Scale.
(Just about all of Thor's hitches have been 8000 lbs since about 2015 or so.)
Thor Forums
