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Old 12-19-2014, 05:53 AM   #1
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Posts: 260
Kingpin extender

I have a 1994 32 ft Gulfstream with the standard pin box. I have noticed the newer rigs have the kingpin extended perhaps 10 inches. I have a short bed F250 that I crunched the driver's side cab on my first long haul trip involving filling up. I was bummed to say the least!

I saw on eBay several kingpin extenders for around $350. What opinions do you guys have? I know for myself the most stressful part of the trip is getting in a tight spot having to stop get out chock the tires and slide the hitch back then do the opposite after getting fuel. I started taking 2 5 gallon gas containers and fill them up and carry 25 gallons of diesel just to keep from getting in a tight spot.

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Old 12-19-2014, 06:19 AM   #2
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Join Date: Nov 2012
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E-Trailer may have a replacement for your hitch pin, look up Sidewinder hitch pin. Our Rockwood came from the factory with the Revolution hitch pin, same as the sidewinder. I have a small dent on either side of the rear window on the truck from a previous 5r so I know what you are talking about, happy I didn't take out the glass.

Joe & Bev
2014 Ram 2500 TCD, 68RFE, CC, SB, 4WD
Rockwood 8289WS, Hensley BD3 hitch
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Old 12-19-2014, 06:22 AM   #3
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Location: Burleson, TX
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You have a slider but have to chock the trailer to move it? What about using the manual trailer brake? Have you considered a Pullrite autoslider?
Yes, an extended box will help, but you need to measure to see if the trailer will clear the cab after installation. If you do get one, consider a MorRyde or Demco with the cushioning rubber to decrease chucking while on bad roads.
They aren't too hard to install with some strong helpers. And you have to be sure what you get will fit the trailer box.
'05 36TK3 Mobile Suites
'10 F450 new to me
'09 F450 Lariat 4x4--died
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Old 12-19-2014, 08:09 AM   #4
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Extending the pinbox may or may not be advisable depending on how well your FW frame can handle the increased mechanical advantage resulting from moving the kingpin forward. I suggest you first contact Gulfstream to see if they can answer your question. You might also want to find a Gulfstream-specific forum and ask the same question. In the alternative, you could test out your turning limit with a helper and see how much more clearance you need to get the TV 90 degrees to the FW. It may be that a slider hitch with just 10 or so more inches of travel will resolve your problem. I just picked up a used Reese 16K non-auto slider for $250 so I know you don't have to spend a lot of money to find a possible solution.
--2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears
--2016 Montana 3711FL, 40'
--SOLD 2014 Wildcat 327CK, 38'
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Old 12-20-2014, 06:53 AM   #5
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My slider is manual so I have to get out and pull the lever.

Yes I should check with Gulfstream....maybe stress the existing pin box and frame.
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Old 12-24-2014, 01:10 PM   #6
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Location: Richmond, TX
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I have a Sidewinder on my Carriage. Works great on my short box, plenty of clearance.
2008 Carriage Domani , 2010 CTD 2500 short bed, Fabex Sidewinder, Husky 16KW
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Old 12-24-2014, 03:25 PM   #7
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Carriage has a robust chassis. OP not as robust.

2003 Teton Grand Freedom. 2006 Freightliner Century 120 with Detroit 14L and Ultrashift.. Full time going from job to job. Building and maintaining plants across the USA. Sold 2006 Mobile Suites 32TK3
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