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Gooseneck and Fifth Wheel Adapters > Adapts Fifth-Wheel Trailer > Fifth Wheel Trailer to Gooseneck Hitch > Bolts Over King Pin > King Pin Adapters > Adjustable Height > Adapts Trailer > Standard > 24000 lbs GTW > Andersen

Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter

Andersen Gooseneck and Fifth Wheel Adapters

ratingratingratingratingrating (10 reviews)

Code:   AM3100



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Shipping Weight: 41 pounds


Andersen Gooseneck and Fifth Wheel Adapters - AM3100

Don't say goodbye to your truck bed. Instead, say hello to the Ranch Hitch fifth-wheel-to-gooseneck coupler adapter. It offers 24,000 lbs towing capacity with 3" vertical adjustment for towing a fifth-wheel trailer with a gooseneck hitch.


  • Heavy-duty adapter converts 5th-wheel trailer king pin to gooseneck coupler
    • Conveniently allows 5th-wheel camping trailer to be towed with a gooseneck hitch
  • Remote coupler release lets you engage and release coupler while standing alongside your truck
    • Eliminates climbing in and out of truck bed
  • 3" Vertical adjustment allows towing with multiple vehicles
  • Do-it-yourself installation in less than 1 hour
  • Works with standard 2-5/16" diameter gooseneck hitch balls
  • V-19 Certification
  • Made in the USA
  • 1-Year limited warranty


  • Application:
    • Standard 2-5/16" gooseneck hitch balls
    • Measurement from bottom of the king-pin plate to top of the hitch ball when trailer and truck are level: 11-3/4" (when adapter is collapsed) to 14-3/4" (when adapter is extended)
    • Required clearance between the overhang of the trailer and the top of the siderails of your truck for safe operation: 5" or 6"
    • Trailers with standard or extended pin box
      • Extended pin box can be no longer than 24" (measured diagonally)
  • Capacity: 24,000 lbs GTW, 6,000 lbs TW
  • Vertical adjustment: 3"
  • Hardware included; optional slide hammer to ease installation sold separately
  • Safety chains sold separately

V-19 Certified for safety and featuring exceptional strength and versatility, this universal adapter converts a fifth-wheel king pin to a gooseneck coupler. This allows you to tow your fifth-wheel trailer without a bulky fifth-wheel hitch. The Ranch Hitch from Andersen Manufacturing is easy to install, even for the inexperienced do-it-yourselfer.

Measuring Your Truck and Trailer for the Ranch Hitch Coupler Adapter

You can perform these steps to determine if the adapter will work for your fifth-wheel trailer.

  1. Back your truck into position as if you were hooking up your fifth-wheel trailer, making sure that the truck and trailer are level.
  2. Measure from the pin plate (the bottom of the pin box) down to the top of the ball in the bed of your truck.
  3. The measurement should fall between 11-3/4" and 14-3/4". (The adapter is 11-3/4" tall when fully compressed and 14-3/4" tall when fully extended.)

Additional Measurements

Five or six inches of clearance between the overhang of the trailer and siderails of your truck is necessary for safe operation.

Diagram of pin box showing where to measure length

Measuring for Pin Box Length

The Ranch Hitch adapter is designed for trailers with a standard or extended pin box up to 24" long (measured diagonally). To find this dimension, you should measure from the centerline of the bottom of the king pin into the back of the pin box as far as you can reach. You may not be able to reach the very back of the pin box itself because the top of it may extend into the trailer. In this case measure to where the pin box disappears into the trailer.

3100 Andersen Manufacturing Ranch Hitch Fifth-Wheel-to-Gooseneck Adapter

Customer Reviews

Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter - AM3100

Average Customer Rating:  ratingratingratingratingrating4.9 out of 5 stars   (10 Customer Reviews)

- AM3100

ratingratingratingratingrating by: Garry S.01/08/2014

Is this review helpful?

I have pulled my camping trailer approx. 300 hundred miles since I installed the adapter. It works great. Installation was pretty simple, the only difficult part was drilling the four holes thru my fifth wheel box. E-trailer service and shipping were great!112247

- AM3100

ratingratingratingratingrating by: Jason M.07/22/2013

Is this review helpful?

Seems to be a very well built product. Good price and shipped fast. Fairly simple to install, I recommend having a friend or two around to help tighten everything down. Also I preferred to bolt rather than weld ( unless you have a closed off pin box), you never know when you may need to go back to fifth wheel in a hurry.90774


How does collar system attach to king pin ? Thanks

comment by: L Thrash - 11/19/2013


There is a threaded collar that is fitted to the king pin. You would slide the coller up on the king pin. While holding the collar, you will take a split collet and fit that where the jaws normally grab the king pin. You will slide the threaded collar over the split collet and using either a pulley puller or Andersens hammer to seat the collar fully onto the split collet. I have added a pictorial of this portion of the instructions to the photo gallery and linked it here as well. The base of the adapter threads onto the collar and is tightened to ~1200 ft. lbs. The process for getting that much torque is outlined in the instructions and uses the included spanner wrench and a 4 foot cheater pipe. Finally, you will use either the inlcuded four Grade 8 bolts or four 1 inch tack welds to finish securing the adapter to the pin box. If you want to be able to remove adapter, make sure you can access the inside of the pin box so you can use the bolts vs. welds.

Patrick B - 11/26/2013

- AM3100

ratingratingratingratingrating by: Frank R05/03/2013

Is this review helpful?

I recieved your shipment in seven days (FREE) was able to install it myself in about 2 hours with help to lift the 5th wheel down to floor level to drill six holes mounted the spacers as per instructions printed out. put the goose neck back in place and the (easy) job was done !78770

- AM3100

ratingratingratingratingrating by: Mark02/13/2013

Is this review helpful?

Installed in about ten minutes, ( I used a bearing puller to seat the bushings ) five minutes to tack weld it into place and done. Pulls better than a fifth wheel hitch IMO. Seems to be made very well. Took two days for deliver. Very satisfied66241

- AM3100

ratingratingratingratingrating by: Dean K04/08/2011

Is this review helpful?

Product shipped/arrived timely from eTrailer; installation instructions provided by Anderson Manuf are very clear/easy to follow. Hitch is very easy to install. Attached to 30' fifth wheel, 11,000lbs tow weight and immediately pulled the trailer thru steep hill country without any hesitation. Pulling cattle trailers/heavy hay trailers, i know heavy duty hitches when i see them and this is a great product; HIGHLY recommended. Remote latching mechanism is a great feature; it too is very solid/secure11335

- AM3100

ratingratingratingratingrating by: Dave G04/02/2014

Is this review helpful?

Way to easy to install. Took About 30 Min. start to finish. Keystone 278 RKS pulls like a million dollars123404

- AM3100

ratingratingratingratingrating by: John P.08/23/2013

Is this review helpful?

A friend and I installed the gooseneck adaptor with no trouble at all. The first time I pulled my trailer, I didn't think it was behind me. It made the pull so easy. Thanx so much.....96509

- AM3100

ratingratingratingratingrating by: Lucas Q07/15/2013

Is this review helpful?

Good product, built well, easy installa tion.89633

- AM3100

ratingratingratingratingrating by: Rob M12/10/2012

Is this review helpful?

Really like the cable to release the lock. Would like see the set bots to be a hex head to make it easier to torque down properly. 61041

- AM3100

ratingratingratingratingrating by: Tom B.03/23/2012

Is this review helpful?

Very easy to install had to use weld methed on king plate like very well would buy again. Price very good shipping good.34939


I have an Ultra-Fab trailair air ride kingpin system on my fifth wheel. Can the gooseneck adapter be installed on that type of system?

comment by: Deriek E. - 8/14/2013


According to Ultra-Fab, the Trailair pin boxes are not to be used with any kind of gooseneck adapter where the pin box is adapted to attach to a gooseneck ball. You can however adapt the truck to accept a 5th wheel hitch. Your best bet would be a fifth wheel hitch that anchors into a gooseneck like the Draw-Tite Hi-Rise, part 9480 or a Curt Fifth Wheel Adapter plate like C16210 or 16310.

Patrick B - 8/19/2013

Ask the Experts about this Andersen Gooseneck and Fifth Wheel Adapters
Expert Answers about Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter - AM3100                                            Do you have a question about this Gooseneck and Fifth Wheel Adapters?

  • Is the Convert-a-Ball Gooseneck Adapter Quick and Easy to Install for Towing Multiple Trailers
  • The Convert-a-Ball Gooseneck Adapter, part # CAB-C5G-14 would be the best part for you. It is very quick to install or remove, just a matter of tightening a few nuts and bolts. No drilling needed. The collar uses three allen screws to lock down on the king pin. The adapter then uses bolts to lock onto the collar. Pretty quick process. It may be easier if you have a second person to help hold up the adapter while you tighten the bolts and jamb nuts.
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  • Maximum Height Adjustment for the Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter
  • The maximum height of the Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter, item # AM3100, is 14-3/4 inches when fully extended. Towing a 5,500 pound fifth-wheel trailer with a 1/2 ton pickup is possible as long as the GCVWR (Gross Combined Vehicle Weight Rating) of the vehicle is equal to or more than the weight of the vehicle and the trailer. You will need to take into account the load in the trailer as well as the trailer weight. To set the hitch height you will need to par
    view full answer...

  • Calculating Clearance Between the Bumper and 5th Wheel Trailer on a 2005 Ford Super Duty
  • There are a few measurements you will need to make in order to find the clearance. Find the distance from the center of the gooseneck ball, in the bed of the truck, to the closest part of the trailer under pinning. Make sure the trailer king pin is centered over the gooseneck ball and both vehicles are as level as you can get them. You will then need the distance from the center of the gooseneck ball to the farthest diagonal measurement to the corner of the bumper. You would then subtract th
    view full answer...

  • How to Measure If Ranch Hitch 5th-Wheel-to-Gooseneck Adapter, # AM3100, Will Fit on 2009 Ford F250
  • To determine the offset needed on your 2009 Ford F-250 short bed, you need to take the width of your trailer and divide by two. Then measure from the gooseneck hitch ball in the truck to the back of the truck cab. That dimension should be 4 inches more than your first measurement for correct clearance. For example, if your trailer measures 96 inches wide, take half (48 inches), then add 4 inches (52 inches). So if the measurement from the gooseneck hitch ball in the truck to the back of the t
    view full answer...

  • Ranch Hitch 5th-Wheel-to-Gooseneck Adapter # AM3100 Attachment to Pin Box and Gooseneck Ball
  • The Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter, # AM3100, attaches to the trailer king pin with a collar system. This system contains a threaded collar and to split collar halves. The threaded collar is installed around the king pin with the X on the bottom of the collar down. The split halves are then assembled around the king pin with the X on the bottom of the halves down and the split collar is pulled down around the split halves. Anti seize lubricant, item # LT37616, shoul
    view full answer...

  • Will a Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter, part # AM3100, Haul Safely
  • I talked with our contact at Andersen and he said that they have sold quite a few of these Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter, part # AM3100, and they have had no serious issues with them unless the trailer was unusually long and heavy. He said that if your trailer is longer than 38 feet long and is considerably heavy, you should check to make sure that you have a quality pin box installed in your trailer. My contact also said that if you are still unsure, it would
    view full answer...

  • How To Measure Pin Box Length for Ranch Hitch Universal 5th-Wheel-to-Gooseneck Adapter # AM3100
  • You will want to measure from the bottom front of the pin box (front would be the part of the box nearest the towing vehicle) diagonally to the rear top corner. There is a diagram in the instructions, linked below, on page 5 that shows this measurement.
    view full answer...

  • Using Ranch Hitch 5th Wheel to Gooseneck Coupler # AM3100 on a 1999 Ford F-250 Super Duty
  • The set up on your 1999 Ford F-250 Super Duty certainly sounds like it was done correctly. If there are any issues, it probably will not be on the truck side. You will need to contact the 5th wheel trailer manufacturer to see if the Ranch Hitch, # AM3100, can be used. If the trailer has an extended pinbox, it will most likely need to have the frame reinforced by a qualified professional welder. The use of an adapter like the Ranch Hitch can put extra stress on the trailer frame and gooseneck
    view full answer...

  • Recommendation for a 5th Wheel to Gooseneck Trailer Adater for a 2004 Ford F-350 Crew Cab 4x4
  • No question for me, I absolutely recommend the Ranch Hitch, # AM3100, that you have selected. It has a gross trailer weight capacity of 24,000 pounds and a pin weight capacity of 6,000 pounds. Plus, it has 3 inches of adjustability from 11-3/4 inches, up to 14-3/4 inches. To determine the height you will need for any given trailer, there are some simple measurements you can take ahead of time. First, back your truck into position as if you were hooking up your fifth-wheel trailer, making sure
    view full answer...

  • Will I have Clearance to Tow a Gooseneck Trailer if I have a Welder in the Bed of my Chevy Dually
  • Generally speaking, you would most likely need more than 36 inches of clearance from the center of your axle to the cab of your vehicle, or in your case the welding machine that is in the back of your truck. There are many factors you should consider. First thing, how tall is your welder? How wide is it? If it is shorter than the overhang of your trailer it may not be an issue. Also, If the welder is pretty narrow and your trailer has a tapered nose it may also work. In order to determine
    view full answer...

  • Recommendation for a Gooseneck to Fifth Wheel Trailer Hitch Adapter for a 2006 Dodge Ram
  • It sounds like you need a Gooseneck to fifth Wheel adapter like # KP84HB. This 4 inch outer diameter square tube will fit as an inner pipe on most standard gooseneck outer tubes. The overall length is 34-3/4 inches. We also have a round adapter that has an extend height of 31-5/16 inches, # BD0289580300.
    view full answer...

  • Recommended Gooseneck Adapter When Height of Fifth Wheel Trailer King Pin is Not Known
  • Because you do not actually know the height of the trailer, using the Ranch Hitch Universal Adapter, part # AM3100 that you referenced would be a good bet, due to its 3 inches of height adjustment. If your F450 has the short bed, I would advise using the Ranch Hitch Universal Adapter, part # AM1319. This adapter offers the same height adjustment, but also offers an 8 inch offset to the rear, to allow proper clearance between the front of the trailer and the rear of the truck cab. Knowing t
    view full answer...

  • How to Remove the Ranch Hitch Adapter From a 5th Wheel Trailer King Pin
  • You are correct, the Ranch Hitch, # 3100, adapter base does thread onto a collar system, see drawing, comprised of a collar and 2 wedges that fit around and into the recessed portion of the trailers king pin. When the adapter is tightened onto the collars system on the king pin the connection is very solid and hard to break. Once the bolts are removed from the trailer pin box, you will need the Spanner Wrench for Ranch Hitch Coupler Adapters, # AM3104, and a 4 foot cheater pipe, along with
    view full answer...

  • Can I Use Universal 5th-Wheel-to-Gooseneck Coupler # AM3100 To Pull 35 Foot Cherokee Trailer
  • The Universal 5th-Wheel-to-Gooseneck Coupler, part # AM3100 can be used with a 35 foot trailer like your Cherokee trailer. Part # AM3100 is not recommended for trailers that are longer than 38 feet as our representative at Anderson has informed us in the past. You will want to take a measurement to make sure this coupler will work with your truck and trailer. You will want to back your truck up under your trailer as if you were going to hookup, making sure the truck and trailer are level. Mea
    view full answer...

  • Recommended Gooseneck Hitch for a 2008 GMC Sierra and Trailer with a Ranch Hitch 5th-Wheel Adapter
  • I would recommend the Curt gooseneck hitch kit # C615-632 for your truck, which will work whether you have a 6-1/2 or 8 foot bed on your 2008 GMC Sierra. Please note that if your truck has a 6-1/2 foot bed, you should be using a fifth wheel to gooseneck adapter that has an offset to give you enough clearance in tight turns. Ranch offers the offset section as a replacement part # AM3140, if needed. It would be a good idea to purchase the Ranch Hitch safety chains, part # AM3109. You may also w
    view full answer...

  • How To Determine Which Fifth Wheel to Gooseneck Adapter To Use on a Ford F-250 Long Bed
  • Usually on a Ford F-250 long bed (8 foot) truck an offset gooseneck adapter is not necessary, but you can measure to see if you would need one. To determine the clearance needed on your F-250 long bed, you need to take the width of your trailer and divide by two. Then measure from the gooseneck hitch ball in the truck to the back of the truck cab. That dimension should be 4 inches more than your first measurement for correct clearance. For example, if your trailer measures 96 inches wide,
    view full answer...

  • Chucking Experienced With 5th Wheel to Gooseneck Adapter
  • The attachment point between the fifth wheel king pin and the Ranch Hitch adapter is very tight. Threaded collars attach to the king pin, then the black adapter base threads onto the collars. The upper flange on the black adapter will actually bolt to the underside of the fifth wheel pin box. There will be no movement there. Any movement or chucking will be experienced at the point where the adapter attaches to the gooseneck ball. The chucking would be about what you would experience with a g
    view full answer...

  • Is an Offset Adapter Needed to Tow a 5th Wheel with a Gooseneck Hitch on a 2011 Ram 2500 Short Bed
  • You will need to do some measuring to determine if you will need an adapter with offset or not, or if you will even be able to tow a 5th wheel trailer with your gooseneck hitch. Here is how to determine if an offset would be required. First, measure from the center of the hitch in the bed of the truck, and add any amount of extension from the front of the trailer to the center of the king pin on your fifth-wheel trailer. If the king pin is recessed under the front of the trailer subtract that
    view full answer...

  • How Can the Ranch Hitch Be Attached to a Pin Box
  • The Andersen Rapid Hitch # AM3100 that you referenced can be installed with either 4 grade 8 bolts or with 4 1-inch tack welds placed by a certified welder. Here is the step from the instructions that is about the attachment of the the unit to the pin box: There are eight holes drilled in the Ranch Hitch Adapter Base, but only four need to be used. You will be responsible to choose which 4 holes will be used to accept the Grade 8 Bolts; try to evenly spread the load as much as possible. Ta
    view full answer...

  • Rapid Hitch Universal Coupler Adapter # AM3100 Will not Release from Gooseneck Ball
  • We have not received any reports of the Rapid Hitch Universal Fifth-Wheel-to-Gooseneck Coupler Adapter, # AM3100, not releasing from a gooseneck hitch, but the cable release system for the pin that secures the adapter to the hitch ball is a pretty simple set up and should be easy to troubleshoot. I would recommend removing the four bolts on the housing that the cable is attached to. Once removed, you will see a small cable attached to a metal plate. There could be two issues here, either the
    view full answer...

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