Finally - the elusive door jamb sticker...
OP wrote:
We got the TV weight by subtracting the TT weight from the total weight.
Bad idea...
OP wrote:
Tongue weight was 740#, or just under 13% of the loaded weight.
OP wrote:
Uh oh - I just saw the payload information. 1230, huh? I think we may be OK
As I told you, you have to actually weigh your truck separatly. To prepare for this weighing, you should load the truck as if you were going for camping with your usual supplies:
Your driver
Your passengers
Any food, snacks and drinks
Firewood, generators, camping chairs, tables, and other supplies
Your hitch
When you go to the scale, you will get a weight that tells you what your total vehicle weight is. The number on the sticker that is most important to you is the one that tells you what the maximum weight that the truck can handle. This is called the Gross Vehicle Weight Rating (GVWR). Yours is 7300 lbs. You would take the GVWR and subtract the weight of the truck from the scale. What's leftover is how much you tongue weight you can carry.
Instead, you calculated the weight of your TV, and gave a ficticious number of 67XX. Assuming your number is 6700, simple math of 7300 - 6700 = 600 which is under your stated tounge weight of 730.
Also, 740 is 13.45% of 5500.
If I were you, I'd not want to be just thinking I was OK, however close you are. Your guess of 67XX is after all, just a guess.
However, I made the same observation as Spoon in the post above. Me? I'd still want to know.