Yes, there is a "magic formula" and it is:
GCWR >=
actual weights of
TV + Trailer + stuff
But...gotta decide if you believe in your OEM's rating/specification system or not....and are willing to both go out and actually weigh your TV/Trailer/Stuff or use their max ratings as the basis to do the simple math
Actual tongue weight is VERY subjective. Even if taking two setups with the exact same TV & trailer. Folks load up differently and even the folks weigh in differently...the why of the formula above and weighing everything (or knowing their actual weights...or using the max weight ratings...GVWR of both TV & trailer, etc)
Also, above assumes stock. If you have modified, then your re-engineering must take that into account...luck that most OEMs have such a high margin designed in today, that many can overload and not notice...they just reduced their setups performance and longevity
You will also need to know your OEMs (both TV and Trailer) ratings:
GVWR
GAWR (front and rear)
GCWR
MTWR (max trailer weight rating) is only applicable if you own a curb or stripper model, one 150LB driver and pretty much nothing else loaded onto/into the TV
Diff ratio, but with today's close ratio (more gears) and Tow/Haul button, generally a moot discussion
macminn wrote:
The towing capacity of my suburban says 6,000 lbs. Is there a magic formula I should stay under as far as trailer? I've been told to stay around 5,000. We really like one that's 5,400.