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NCMODELA's avatar
NCMODELA
Explorer
Jun 29, 2013

Scale Weights

Hi, I took my trailer (2011 Keystone Summerland 26 BH) to the scales today with the TV 2003 Yukon xl. This is what I got, tow vehicle with the TT hooked up was 6360, Both combined is 11720, Trailer was 5560. My GVWR is 7000 so I can make that with the four kids (will be about 6800lbs). My GCWR is around 13,300 lbs, So i am okay there. It took it to the city of raleigh yard waste scales, i have no idea how accurate they are. (but when you add up the TV, TT (6369 +5560 = 11920) but the scales read 11720 when both were on there)

My first question is if you subtract the TV weight with the TT attached from the TV with nothing attached that will give you the tounge weight and you have to add that to the TT weight. If i do that then i get 6240 with 680 as the tounge weight. That is 11% of the trailer weight. This is with the wdh hooked up.

Second question, I hooked up the wdh, and got the front wheels back to normal (only raised 3/4 in when hooked up, but to do this I have 6 links on one side and 7 links on the other, is this okay?

Third question, I tried to level the trailer with the hitch height and It is nose down, it measures 20" in front, and 22" in the back, is this too much of a nose down? I am as high on the hitch that i can be, if i turn it around and be at the lowest then I am still too high and the tt is nose up.

Fourth question. The trailer drove great and the car pulled it great. but it seemed to bounce in the rear end alot when the trailer bounced (more like a flex) this was only on bumpy roads.

Sorry for the long post.
  • It is a reese round bar 1000lb bar. The height before hookup was 44 3/4 after hookup 45 1/2 and after wdh 44 3/4 on one side 44 7/8 on the other. The one side has 6 links the other 7. I could probably reduce it to 6 and take up the 1/8 but my arms were getting tired.

    I am getting confused on the math. I weighed the truck with trailer attached and it was 6360 lbs, Trailer was 5560 and tv alone was 5680 (with full gas tank and me in it with all the hitch and bars)

    So I thought if you take TV (hitched) - TV (unhitched) that gives you the tounge weight that is distributed across the vehicle. You then take that weight and add it to the weight of the trailer (5560) and you have the weight of the trailer. I must be missing something.

    Thanks
    Bill
  • You really need to get your actual tongue weight. Three passes needed as stated above. One with TV only, one with TV + TT and WDH hooked up, and one with TV + TT without WDH hooked up (bars in TV). With this, you can determine not only weight transfer to steer and drive axles, but tongue weight and weight on TT axles (before and after WDH hooked up).

    Doing all the math with scale tickets in hand can be confusing, so ask for help if needed. I have been through this but am no expert.

    You also should take your scale weight for the TV by itself and subtract it form the GVWR on your door jamb sticker. This will give you your actual available payload weight. Should do with full tank of gas. Can have driver only or family, dog and cargo as long as you take it all into account properly in the end. Important to know so you don't overload the TV. You want to know how many humans and pets and how much cargo you can put in TV with TT hooked up. You might get a bit of a surprise. Don't forget that your hitch receiver will have a max. tongue weight on it too.

    Typically you run out of payload before long before you reach the GCWR or hit the front and rear axle ratings on the TV.

    If you have a lot of bounce in the rear of your TT, you could have undersized spring bars. Your bars should have the max. tongue weight indicated on them (at least we do). You *could* have a lot more tongue weight than you think and if your bars are in fact undersized, it can result in more rear end bounce in the trailer. Just found this out the hard way ourselves. If your spring bars are too undersized, you will also have problems in "winding" them up enough to transfer weight to the steer axle.

    I suspect you are not transferring enough weight to the front of TV. The number of links in your chains depends somewhat on what WDH you have. Perhaps you can say what it is and also post a pic. Links must be the same on both sides. If you find you have to use gorilla force to get the bars onto the snap-up brackets, something is not right. You should be jacking the rear of the TV up a bit with trailer hooked up to make it easier to hook up the chains. Do you know what your particular vehicle should settle back to when the WDH is hooked up? Different makes and models vary and your WDH manufacturer will likely say something on this too.

    There is a difference in the number of links between trunnion style and round WDH spring bars, and again info. on your WDH would help. Typically you should have 3 or 4 links left over (hanging loose). Sounds like you have too many links between snap-up brackets and bars.

    If you do the three passes you can determine how much weight is transferred to the steer axles, the drive axles and the trailer axles. Greatly assists in setting up the WDH more accurately. You could possibly have to adjust the number of links in the chains or even to have to tilt the bars up or down. You should get the trailer leveled better before you do all this though. Slightly nose down is okay so it sounds like another inch would work.

    If you don't have any type of sway control, it is highly recommended, esp. for your trailer size. Various ways to accomplish this along with lower to higher cost.

    Once you do get it all "dialed" in, you will find it is really nice to tow!
  • Trailer weight of 6360 rally has zero bearing on your GVWR of 7,000 lb. ONLY the tongue weight counts toward your tow vehicles GVWR. The best way to get an accurate tongue weight is to actually WEIGH the tongue (hitched to nothing and NEVER with the WD system hooked up. If your WD was not used during weighing then you COULD come reasonable close to tongue weight by weighing the hitched rear tow vehicle wheels then unhitching and weigh them again and compute the difference. Just as EASY though when you unhitch, just weigh the tongue.
  • If you have your WDH hooked up, then that won't give you the tongue weight. For travel trailers, to get the tongue weight, you need a 3rd trip across the scales with you WDH torsion bars in the back of the TV.

    Equalize both sides of your WDH to the same amount of chains.

    Your heights seem ok. It is only about 1 inch off. To correct that, you could get a 1" raised ball from etrailer.

    If you drive on certain roads with expansion joints, you could get into a rhythm of bouncing caused porpoising.