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Open Roads Forum  >  Towing

 > Weight Dist. problems/Help.

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Badstang79

Iowa

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Posted: 06/27/12 08:06am Link  |  Print  |  Notify Moderator

I have a 2007 K-Z Jag 28' JBSS with a dry weight of 6360 lbs. and tongue weight of 760 that I pull with my 2004 F150 Supercab 4x4 5.4. When I bought the camper the dealership set up the hitch, but I could not get the truck in to match it up, so they took the receiver measurement and off we went. After some research and a few reapirs on the truck I came to the conclusion that something wasn't right so I took the following measurements and took it back to the dealer. Unloaded the rear is at 40 1/4" and the front is 39 5/8". With trailer on and no wd the back is at 37" and the front 40 3/4". Then with wd the back is at 37 1/2 and the front 40 1/4". The dealer adjusted the head shank which did not affect the stance of the truck at all, just less links used. I'm at 5 links where I was at 7 before and the trailer is level with the system on. They told me nothing could be done because I have a leveling kit in front. Now to the point..Is there anything I can do i.e adjust ball height to help alleviate some of the sag on the back? I can go up two more links before I am maxed out. Any suggestions or help would be greatly appreciated! Thank You.

netaq

Atlanta, GA

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Posted: 06/27/12 08:21am Link  |  Print  |  Notify Moderator

What kind of hitch is it, and what's the weight rating? With the WD installed you should drop < 2" in the back; it sounds like you're getting insufficient leverage from the WD bars. Did you happen to take a side pic of the trailer hooked up? That may help troubleshoot...


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APT

SE Michigan

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Posted: 06/27/12 08:54am Link  |  Print  |  Notify Moderator

Badstang79 wrote:

Unloaded...the front is 39 5/8"...with wd ...the front 40 1/4". [\quote]

You need more weight distributed to the front to get the front measurement back to 39 5/8".

Quote:


The dealer adjusted the head shank which did not affect the stance of the truck at all, just less links used. I'm at 5 links where I was at 7 before and the trailer is level with the system on.


What do you mean 5 links or 7 links? Links hanging or under tension? Fewer links under tension means more WD to front which is what you need. More angle to the hitch head also means more tension which is what you need.


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Mafman

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Posted: 06/27/12 08:42am Link  |  Print  |  Notify Moderator

You say the head shank was adjusted. Do you mean pitch/angle? I've noticed when I play with the angle height does change quite a bit, depending on the angle.


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Mafman

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Posted: 06/27/12 09:33am Link  |  Print  |  Notify Moderator

No need to apologize, we all have to learn the hard way. You're correct about the amount of links - from what I've read here 5 seems to be the minimum.

I've got mine at a pretty steep angle allowing for more tension. You can adjust that by adding or removing washers to the angle pin located behind the shank.

I'd agree that you need more tension so that you can bring the front back down to the unloaded height. Rear squat will come up slightly, but it is normal to have some squat in the rear.

Very rudimently, your main concerns should be bringing the front down to unloaded height and trailer attitude, which should be level or slightly nose down. It takes some fiddling around to achieve this, but it is possible.

Keep in mind you do have quite a big rig (with a heafty tongue weight rating at that) for your 1/2 ton, so rear squat will be practically unavoidable, in my opinion. You may want to consider helper springs in the rear. Proper wighing may even reveal that you're over capacity for your truck.

Also remember these ratings (both your trailer weights and truck capacities) are on paper, and don't take into consideration any gear/liquids you have in there now... As they say, paper is only good for one or two things once you're out on the road!

Be safe./

Badstang79

Iowa

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Posted: 06/27/12 09:15am Link  |  Print  |  Notify Moderator

I'm sorry I shouold've put this in post, it is a curt 17302 system rated at 1000lb. tongue weight and 10000 gross.

When I referred to links these are the ones free. My system has a total of 12 links so with 5 free that leaves 7 under tension, the original setup had me using the 7th link from the top leaving me 5 under tension. I have read a few things that have said you never want to go below 5 as it can cause issues.

When I referred to them adjusting the shank they angled it back towards the trailer if that makes sense... I apologize I'm new to all this and appreciate all your help very much.

APT

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Posted: 06/27/12 10:36am Link  |  Print  |  Notify Moderator

So it sounds like the dealer increased the hitch head angle while reducing the number of links under tension. You may want to try 6 or 5 links under tension again with the increased angle to increase WD to the front and remeasure the fender height again.

Fewer links under tension will raise the front of TT all else equal. So you want also keep that level to slightly nose down, as measured by the frame on flat ground. You may need to drop the hitch head a hole as you increase tension. But those are your two goals, TT level to slightly nose down and front axle weight/fender height same as unloaded. Rear end will squat to whatever it needs to be.

5 links under tension is the minimum for some WDH systems for clearing the frame while turning. Not sure on yours if that is a limit. But I bet 5 links will get your front end right.

Badstang79

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Posted: 06/27/12 10:46am Link  |  Print  |  Notify Moderator

before when I was running 5 under tension it got pretty loud i.e. clanging banging in turns. If 6 doesn't work I'll either have to adjust the angle back more towards the trailer or even drop the ball a notch to ensure level on trailer as well as front of truck...if I'm understanding everyone correctly. Again thank you for being patient.

Badstang79

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Posted: 06/27/12 10:16am Link  |  Print  |  Notify Moderator

I'm definitely going to have to get it weighed next time I'm hooked up. So general theory would be add a washer or two to the back to increase angle on the head unit thus putting more weight to the front?..if I figured correctly?

Badstang79

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Posted: 06/27/12 10:21am Link  |  Print  |  Notify Moderator

I found a picture of my camper on my computer but didn't have one of it hooked to the truck. I can't figure out how to post it here though, it's in my profile.

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