Hi Valerie,
Kitty's right, I typically use the GVWR of the TT against the TV's tow rating to get an idea if the TV can handle the trailer. So you need to find out what the tow rating is on your TV.
What year is you F-150, is it 2wd or 4wd, and what gears does it have. All those will impact what its tow rating is.
The other weight rating on your pick-up that is useful is its GCWR (Gross Capacity Weight Rating).
A 2005 F-150 Ext. Cab w/ 4.6L V8 has a GCWR of 12,200 and a tow rating of 6,900 lbs for 2wd and 6,600 lbs for 4wd.
Now, what do you do with all these numbers. The best way is to actually weigh your TV and trailer at a truck scale, but some calculations will give you a rough idea. Here's an example.
1st figure out what your loaded trailer weight will be. A good guess will be taking the listed UVW + 1,500 lbs for cargo and options.
That would put your trailer at a loaded weight of 6,285 lbs.
The tow ratings on the F-150 is based on no cargo and only a driver.
So guess at the weight of extra passengers and cargo, lets say 500 lbs.
Reduce the TV tow rating by this amount. If your F-150 is a 2wd that its tow rating would be 6,900 - 500 = 6,400 lbs.
Now your tow vehicle's calculated tow rating should be more than your trailer's loaded weight, which it is (6,400 lbs tow rating vs 6,285 lbs loaded TT, we're ok there).
Then you also want to make sure that the total weight of TV and TT is below the GCWR of the TV. Lets say your F-150 will weight 5,000 lbs loaded with all cargo and passegners and we're estimating your loaded TT will weight 6,285. These combined weights should be less than the GCWR of your tow vehcile, which they are (5,000 + 6,285 = 11,285 < 12,200).
The third weight to check to make sure your within the TV limits is it's loaded weight plus the TT tongue weight should be less than the TV's GVWR. We're estimating the loaded weight of the TV is 5,000 lbs. The listed tongue weight of a 2007 T-2499 is 755 lbs. We'll increase that by 100 lbs to account for cargo and LP gas, so the loaded tongue weight is 855. The loaded TV weight plus the loaded TT tongue weight should be less then the GVWR, which it is (5,000 + 855 = 5,855 < 6050 GVWR).
The GAWR can be used to make sure that the weight on each axel of the TV does not exceed these limits.
Depending on where you live you can get the weight of you TV from its title or registration.
What you need to do is replace the numbers in this example on what you think your TV weight is and what is its tow rating and GCWR. I intentially used numbers in the exmaple that makes it look like your TV will handle your trailer. But once you put the real and more true values in, I think you'll find that you're right on the edge, which is not good.
If you let me know what year your F-150 is and if it's a 2WD or 4WD we can find out what it's tow rating is and GCWR. This information should also be specified within your owners manual.
Ford also has an excellent web page on towing. Here's a link to it
https://www.fleet.ford.com/showroom/...ng/default.asp
Hope this helps.
Hutch