Forum Discussion

Seattle_Lion's avatar
Seattle_Lion
Explorer
Jan 23, 2014

TT Weight limits: theory and reality

There are a ton of threads here regarding the proper matching of TV and TT. Based on what I learned here, I made a very expensive decision to upgrade my brand new 1/2 ton to a 1 ton TV so that I would be within the specs for my truck. I am not sorry I did that, but it did cost a lot.

After continued reading, while it is clear what the calculated limits are and that it is a good idea to stay within them, there are a lot of people who disregard them and apparently suffer no pain.

The Ford F150 is the best selling vehicle in the United States. I am sure we have all seen them towing large TT's that are almost certainly overloading the trucks. We towed all last summer, over 3,000 mountainous miles with an Eco Boost F150 pulling our 27 ft TT. We were at least 300 lbs over the MGVWR of the truck. I am a new RV'er and my wife has been doing it for years prior to our meeting. I had no real problems pulling the TT. She did not report any issues.

I am not claiming that we proved the MGVWR rating is not important. What I am saying is that a lot of people are pulling way more trailer than their trucks are rated to handle.

Now that I cost myself a lot of money trading a 6-month-old F150 for a new F350, I am considering that, while a good idea from a spec perspective, from a practical point of view there is a lot of evidence that F150's can tow safely when over MGVWR. This isn't entirely surprising. Truck manufacturers must give conservative ratings to their products in order to avoid liability claims if a customer has an accident and can attribute it to an issue with the TV.

I can't find any statistics that report the number of TT accidents, injuries, or fatalities. We have anecdotal evidence here that people find towing at or above rated limits for the TV can be difficult, but none that report accidents and injuries due to overload. We also know that people who move trailers for a living don't use WDH's, which means that a good part of the time they are towing over the hitch/receiver limit for their trucks, since even a very heavy duty truck has a low hitch weight limit without a WDH. These people keep and use their trucks for years and years.

Of course, we are not discussing massive overloading where springs bottom out under normal driving conditions. I'm referring to overload by 10 to 20 percent of the GMVWR. From a liability perspective, it would be nuts to suggest that people overload by any amount, but I wonder from a practical point of view if there is any real evidence that a 10 to 20 percent overload is going to either damage the truck or pose a threat to the people in it. What do you think?

113 Replies

  • Those that ignore the ratings sacrifice a totally relaxing tow and have increased operating and maintenance cost. There equipment is simply being used beyond its limits.
    That does not mean their rig will self destruct or that they have a miserable tow. But their soft parts will wear quicker and the combo will require more driver input.
    A combo that is within ALL of its rating will perform noticeably better than a combo that is within SOME of its parameters.

    RVs are generally delivered by experience drivers towing empty trailers using dual rear wheel trucks.
    The typical RV is not towed empty with a dually.
    There is a learning curve to RV towing, It is beneficial to start at the beginning and follow the ratings. With experience and a better understanding of the ratings you may have a fudge factor and stray a bit from the ratings.
    Nevertheless for optimum performance staying within all of your combos towing parameters is prudent.
    On a bright sunny day,on open road the parameters aren't as critical. However on curvey,rainy,windy,congested and/or mountainous terrain being within your ratings is essential.
    Many forget the parameters are calculated for bad days and poor conditions and not for the nice days and ideal scenarios.

    I agree there is not a lot of loading accident data,but I imagine most accidents do not occur during ideal conditions,but involve: a curve, bad weather,congested traffic,a sudden stop,a steep descent etc.
  • I am a retired mechanic. and have replace many a part that failed...
    mileage, load, bad roads, Dumb .......

    I think the limit is the limit plus or minus 10 percent... and I add each year a car/truck is used.. that limit should be reduced but 3 or 4 percent...

    if you travel alone so be it... and you might take some one else out.. but if you travel with family.. you might take every one in your family out..

    YES.. 99 percent of the time you will be OK.. but????????

    to the OP. better to have a truck to strong. then the OTHER...
    the money had been spent.. besides the bigger will/should last MUCH LONGER.

    my opinion, and has no cash value.
  • I think engineers study these things a lot more than I ever will. I have to trust their skills and knowledge. Just because someone else is an idiot, I don't have to be. Those that "fudge" do so most of their lives on everything. I had a friend who used to do that...unfortunately, his "fudging" cost him the life of his 12 yr old daughter when he lost his trailer going down a rather large hill. He was only a "little" overweight and a gust of wind took the trailer over the side.

    That said, ONE FATALITY is too much!....Dennis