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Old 07-09-2018, 06:25 PM   #1
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trailer hit cab of truck on a turn

ok im new to the fifth wheel life, but i was driving around the back of barn and turned to the right, not at a full cut, and the trailer nose hit my cab. bent the cab and cracked the nose on the trailer. my question is why? i have a 373QSI toy hauler, and a 2017 f250 truck. too back to dealer there was another set of hole on my hitch so they moved it back to them and today i took both back and still couldnt get a full turn with out trailer coming to hit truck. shouldnt you be able to turn fully? i know if you back up you can jack knife them. i need to make this turn to get out of my driveway. i have a 6'9" box on the truck.

thanks.
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Old 07-09-2018, 06:28 PM   #2
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If you're going to put a 5er on a short bed I really recommend a slider hitch!
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Old 07-09-2018, 06:29 PM   #3
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Depends on your truck and depends on the nose of the camper. I can get a 90 on my truck with a short bed and not hit. But my corners are pretty clipped on the camper. Do you have a slider hitch. This is why they make them.. For us short bed trucks. I have one, just do not need it.. Yet.
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Old 07-09-2018, 06:31 PM   #4
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If the pics I am looking at online are for your model it does not seem to have clipped corners... A lot of camper there.. But my guess is the corners are full width so you need a slider if your gonna cut tight turns.
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Old 07-09-2018, 06:31 PM   #5
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dealer told me that slide was not needed, i even told them i wanted one. said new trailers was set up for shortys. the set of holes they moved the hitch to was for the 5.5 beds???
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Old 07-09-2018, 06:35 PM   #6
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Originally Posted by doc73 View Post
Depends on your truck and depends on the nose of the camper. I can get a 90 on my truck with a short bed and not hit. But my corners are pretty clipped on the camper. Do you have a slider hitch. This is why they make them.. For us short bed trucks. I have one, just do not need it.. Yet.
X2 my Silverback has pretty aggressive notches. I have a 6.5 bed with a reese goosbox. I have had it at about 90 degrees and no problem. If the fiver has a flat nose you should definitely a special hitch.
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Old 07-09-2018, 06:38 PM   #7
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dealer told me that slide was not needed, i even told them i wanted one. said new trailers was set up for shortys. the set of holes they moved the hitch to was for the 5.5 beds???
Pin / saddle area should be right over the axle there abouts. gain, looking online, your nose does NOT appear to be clipped at all so it is NOT setup for short beds.. At least in my opinion.
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Old 07-09-2018, 06:47 PM   #8
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Unfortunately dealers either don't know, don't understand or don't care. Mostly the last or they would have had you test it while there when installing it or had their tech test it.

Slider hitches were designed and made specifically for this issue.

While I understand you are new to the 5th wheel world, there is a certain onus on you to know whether your rig is set up properly.

With that said, I have been towing 5th wheels with short bed trucks for many years. I have a slider hitch that I've never slid.

Could I hit the cab?... yes... but I've never had to turn that sharp, nor would I want to subject my suspension/tires to those kind of forces. Have you ever seen how the tires and springs roll over on a really sharp turn? Not something I plan to do with any frequency.

Best of luck getting it sorted out.
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Old 07-09-2018, 06:52 PM   #9
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Unfortunately dealers either don't know, don't understand or don't care. Mostly the last or they would have had you test it while there when installing it or had their tech test it.

Slider hitches were designed and made specifically for this issue.

While I understand you are new to the 5th wheel world, there is a certain onus on you to know whether your rig is set up properly.

With that said, I have been towing 5th wheels with short bed trucks for many years. I have a slider hitch that I've never slid.

Could I hit the cab?... yes... but I've never had to turn that sharp, nor would I want to subject my suspension/tires to those kind of forces. Have you ever seen how the tires and springs roll over on a really sharp turn? Not something I plan to do with any frequency

Best of luck getting it sorted out.



totally understand where you are coming from, i asked dealer if the hitch was tested and adj properly, they said yes, i knew i should of insisted on the slider, but i guess its live and learn, i just looked at the husky slider, im going to get ahold of dealer and get one. thanks for all the replys,
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Old 07-10-2018, 01:13 PM   #10
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ok im new to the fifth wheel life, but i was driving around the back of barn and turned to the right, not at a full cut, and the trailer nose hit my cab. bent the cab and cracked the nose on the trailer. my question is why?
thanks.
All cars and light duty trucks (except a few optional F350) have a steering wheel cut of 36-37 degrees max. That is the sharpest the front wheels will turn relative to the vehicle body. That will prevent vehicle to trailer contact when making a 90 degree turn, say at an intersection. But fivers cut inside the tow vehicle and at some point contact will happen. Maybe 120 degrees, maybe 160, maybe 180. It will happen sooner with longer trailers. Without a full steering wheel cut you should have been OK, unless maybe you cut first to the left and then to the right. Or maybe you pulled past the barn and kept turning to bring the fiver closer to the barn (greater than a 90 degree turn for the truck).

Even with a slider, it is possible for the truck and trailer to make contact, but the side of the trailer will hit the cab. Bottom line, you have to pay attention whenever you are turning and know your limitations.

FYI, the Ford cab-to-axle distance is around 40 inches and with an 8 ft wide trailer, the max angle before contact would be 56 degrees IF the back of the cab and the front of the fiver were both perfectly straight. In reality both have at least some curvature.

Now if you try to make the tightest 90 degree turn and start with the steering wheel at full lock, then the front tires are already turned 36 degrees before starting. That means the truck only has to turn 54 degrees before the front tires have completely turned 90 degrees and returning the steering wheel to center. So, IF the fiver didn't move a single inch (impossible) then the angle between truck and fiver would also be 54 degrees. In reality since the fiver will turn while making the tightest possible 90 degree turn, the worst case angle between truck cab and fiver would only be around 45 degrees.

There are only two items that will create a problem, the front of the fiver is measurably closer than 40 inches or the turn is really more than 90 degrees.
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