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  1. Gooseneck and Fifth Wheel Adapters
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Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter

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

Item # AM3100
Our Price: $550.99
You Save: $31.27
Gooseneck and Fifth Wheel Adapters
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Shipping Weight: 44 lbs
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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. 1-800-940-8924 to order Andersen gooseneck and fifth wheel adapters part number AM3100 or order online at Free expert support on all Andersen products. Great prices and Fastest Shipping for Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter. Gooseneck and Fifth Wheel Adapters reviews from real customers.
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  • Reviews (119)
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Andersen Gooseneck and Fifth Wheel Adapters - AM3100

  • Fifth Wheel Trailer to Gooseneck Hitch
  • Bolts Over King Pin
  • 24000 lbs GTW
  • Andersen
  • King Pin Adapters
  • Adapts Trailer
  • Adjustable Height
  • No Offset

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


  • 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 used to ease installation (AM3103) sold separately
  • Safety chains sold separately
  • 1-Year limited warranty


  • This adapter is designed to be used with standard pin boxes only. Do not use with a cushioned or air ride pin box.
  • Any adapter that attaches in this way may void your trailer's warranty.

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 Satisfaction Score:

Customer Reviews

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

Average Customer Rating:  4.5 out of 5 stars   (119 Customer Reviews)

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.


As with any Anderson product I have used, I'm very happy. Very well made products and great customer service


Works great! Used the Anderson Ultimate in the past and it worked great until I put a fuel tank in the truck. After that there wasn’t enough room for the Anderson, needed something different. Check spacing on several hitches but none allowed the room. The gooseneck adapter works as advertised and now have extra bed space for gear. Picked up the gooseneck safety chains also from another vendor just to add the extra safety margin in there. Adapter is easy to hook up and works great. Still have to climb in the bed to hook up safety chains but it does work. Also love the plastic pad between the ball and the hitch so I don’t have a greasy gooseneck ball to deal with.


Well built, perfect fit, very easy to install, definitely worth it

Still holding up great, super gooseneck Ranch hitch
William P - 11/02/2021


Product looks good not installed yet, was hoping to talk to an actual person before I ordered to see if any discounts were available but never got to talk to anyone neither on the phone or chat so ordered on line


Real fast shipping, and a competitive price. Easy to follow directions and simple installation. This is a great product.


Works great just pulled it 10hrs no problem. Just wish the flare on the bottom didn't come down so far. Works fine on my CM flatbed but will rub a bit over steep hills.


Recently purchased my first covert a ball hitch it arrived chuckle and installed in under an hour works well


excellent service and excellent product the AM3100 is the best choice to go from 5th wheel to gooseneck


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.

How does collar system attach to king pin ? Thanks
-- comment by: L T - 11/19/2013


Received product 5-10-2017
on 5-11-2017
Gave a test run and seems good fella good and looks great. I like the 24000 and 6000 lbs feature think it is stronger of course.


That’s the second hitch I’ve purchased and have enjoyed them both. Have not had any complaints


As always, a great product from! This company is fantastic. Very helpful, with a wide selection of products and fast shipping. I have been a customer for a couple of years now, and always make this my first stop when looking for parts and products for my camper and trailer. You will not be disappointed in the service, and if you have any questions Renee will be glad to hunt down the answers for you. Thank you again!


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!


Works like charm. This is the best way to fifth wheel. No messing with a big heavy bridge in the bed of the truck.


As advertised, easy to install and works well.


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.....


Was very impressed with the quality and it’s made in the USA!….


I haven't had a chance to install, currently-20 wait for a warmup. Anderson products have always worked great. Built well. Factory service great and friendly.


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

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 - 08/14/2013


Quick delivery. Great communication from order to delivery.


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/secure


Good product is a pretty good product but can't figure why you changed 1/2to 9/16 drill hole with out flat washers to big for the 1/2 lock washers


The Ranch HItch 5th wheel adapter AM3100 was everything that we needed and more!! It fit perfectly and was a breeze to install. We will be pulling our "home" around the country when we retire. We didn't want to have the back of the truck to be full of "hitch" with no room for much else. The Gooseneck adapter is the perfect choice for us!! GREAT PRODUCT!!!


Haven’t towed with it yet. Install was a breeze if you have some tools. I do like the way this attaches better than other. The treaded collar makes for a strong fit.


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 satisfied

Show More Reviews

See what our Experts say about this Andersen Gooseneck and Fifth Wheel Adapters

  • Will Ranch Hitch 5th Wheel to Gooseneck Adapter Fit 2001 Dodge Ram 1500 and 2004 Ford F-350 Flatbed
    The Andersen Ranch Hitch adapter, # AM3100, will couple to a 2-5/16 inch ball and it is height adjustable from 11-3/4 inches tall to 14-3/4 inches tall to compensate for the recessed gooseneck ball in your 2004 Ford F-350 flatbed. The 2001 Dodge Ram 1500 should be no problem. On the flat bed you will need to make sure that the opening around the gooseneck ball is at least 6 inches in diameter or 6 inches square. The overall width at the bottom of the adapter is 5-1/2 inches so there will...
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  • Why Did my Trailer Overhang Contact the Bedrails of my 2006 Ram 2500
    The problem you had is not related to the length of your truck bed. What really matters is the distance between your truck bedrails and the overhang of your trailer. If the truck you have with a long bed sits lower than your short bed truck and you could adjust more height into your Ranch Hitch part # AM3100 then it could work for you. Typically when the trailer and truck are sitting level you want between 4-6 inches between the bedrails and the trailer overhang. But if your driveway has...
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  • Do Long Bed Trucks Need Offset Adapters for Making Sharp Turns
    Typically long bed trucks do not need any additional offset to allow them to make a sharp turn. Usually that is only needed on short bed trucks. If the offset you plan to use has been confirmed to work with the hitch you have installed in your truck you should be fine. Here's the formula to use to determine if you have cab clearance. (A + B) - C = Clearance A = Distance from the gooseneck ball to the truck cab B = Offset used C = Width of the nose of the trailer divided by 2.
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  • Troubleshooting Trailer Bounce on a Fifth Wheel Trailer
    First thing I would check is that the trailer is being towed as level as possible. Typically the problem of trailer bounce is due to a major problem with the trailer's suspension. I would recommend you go over the suspension of the trailer looking for any worn components and repair as needed. Do the trailer's tires look to be wearing evenly? Check to see if there is any strange wear on the tires. Typically suspension problems will cause trailer tires to wear strangely.
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  • Fifth Wheel to Gooseneck Hitch Adapter for Moving Trailer Out of Storage
    I would recommend the Ranch Hitch Adapter part # AM3100. This will attach to the king pin of your trailer and then will provide you with a gooseneck coupler to attach to your gooseneck hitch. Check out the review video I attached for more info as well.
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  • Could the Andersen Gooseneck Adapter # AM3100 Be Used On a Flat Bed Truck
    It sounds like the bottom of your fifth wheel king pin is 48-1/2 inches to the ground and the top of your flatbed is 39 inches from the ground. This would mean that you would you would need an adapter that can go down to 9-1/2 inches if the ball on your trailer sits on top of the bed. Typically flat bed trucks use a recessed gooseneck ball that sits below the top of the bed of the truck so you may find that the # AM3100 that you referenced would work just fine for you. You would need to...
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  • What is Minimum Clearance Between Rear Corner of Truck and Trailer for 5th Wheel Towing
    The recommended clearance from the rear corner of your truck bed to your fifth wheel trailer when in a turn is 4 inches. If you have 3 inches from the corner of your tailgate to the trailer with it DOWN then with it up you should be just fine.
    view full answer...
  • Economically Priced Fifth Wheel Trailer to Gooseneck Hitch Adapter
    The best priced fifth wheel trailer to gooseneck hitch adapter we carry is the Ranch Hitch Adapter part # AM3100. This is a universal adapter that would work well on your trailer as long as it weighs less than 24k lbs.
    view full answer...
  • Would a Long Bed Flatbed Truck Have Enough Clearance Around Corners Towing Fifth Wheel Trailer
    Since you have a long bed truck the Ranch Hitch part # AM3100 that you referenced would work well as you would have more than enough clearance between the cab and the overhang of the trailer. Here's the formula though if you wanted to be sure. (A + B) - C = Clearance A = Distance from the gooseneck ball to the truck cab B = Offset used, C = Width of the nose of the trailer divided by 2.
    view full answer...
  • Type Of Bolts Included With 5th Wheel To Gooseneck Coupler Adapter
    I went to our warehouse and checked the Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter, part # AM3100. The couplers still have the 2 square head bolts used for adjusting the height of the coupler. They arrive at our warehouse with the hardware in the box. We cannot endorse using any other hardware than what's supplied by the manufacturer.
    view full answer...
  • Is Torque Wrench Required for Installation of Andersen Gooseneck and Fifth Wheel Adapter # AM3100
    Yes, you will need a torque wrench to install the set bolts of the Andersen Gooseneck and Fifth Wheel Adapter # AM3100 to the torque spec indicated in the installation instructions. Some auto parts stores will rent/lend these. I have sent the complete instructions to you in a separate email.
    view full answer...
  • Does a Ford F-350 Long Bed with Gooseneck Trailer Hitch Need Reinforcement to Use Ranch Hitch
    Since the Ranch Hitch adapter # AM3100 is rated for 24,000 pounds gross trailer weight and 6,000 pounds pin weight, no additional reinforcement is required for use. Generally though when a gooseneck hitch is attached using a fabricated installation and not a custom fit kit then a 1/2 inch steel plate is used, welded and bolted to the truck frame with the hitch bolted and/or welded to the plate. If the gooseneck installation was fabricated and it is not a custom kit then it would be up...
    view full answer...
  • Recommended Fifth Wheel To Gooseneck Adapter
    The Fifth Wheel to Gooseneck Trailer Hitch Adapter you referenced is no longer available, but we may have something that can work for you. I recommend the Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter, part # AM3100. This adapter features a 3 inch height adjustment from 11-3/4 to 14-3/4 inches and has a capacity of 24,000 lbs GTW and a tongue weight capacity of 6,000 lbs. This is for trailers that have a standard or extended pin box.
    view full answer...
  • Why is 5 to 6 Inches of Clearance Needed Between Top of Bed Sides and Underside of 5th Wheel Loft
    There's actually a very good reason why we like to see 5 or 6 inches of clearance between the underside of the trailer loft and the tops of the bed sides. If you make a downhill turn, the underside of your trailer loft will actually be pointing downward. If you don't have enough clearance, the front corner of the loft underside can hit the top of your bedside, which would likely damage both. In most cases you can adjust the height of the hitch head and lower the pin box to add sufficient...
    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....
    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....
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  • 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...
    view full answer...
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  • Installation and Safety of the Fifth Wheel to Gooseneck Trailer Hitch Adapter # AM3100
    The Fifth Wheel to Gooseneck Hitch Adapter, part # AM3100, is very easy to install and use. The base of the adapter will clamp down on the gooseneck ball in your truck bed just like a regular gooseneck coupler. You will insert the fifth wheel trailer king pin into the top of the adapter, and then bolt it to the base of the kingpin using provided mounting hardware and existing bolt holes. This is a very safe product, it has a Gross Weight Capacity of 24,000 pounds and 6,000 pounds Tongue...
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  • Hitch Alignment with a 5th Wheel to Gooseneck Trailer Hitch Adapter
    Yes, you will be able to hook up to the trailer at an angle as long as you can get the truck positioned under the Fifth Wheel to Gooseneck Trailer Hitch Adapter, item # AM3100, properly. Just make sure that you do not back into the trailers loft section if there are clearance issues.
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  • Ride Quality and Towing Safety with a Fifth Wheel to Gooseneck Trailer Hitch Adapter
    Turning and backing with the Fifth Wheel to Gooseneck Trailer Hitch Adapter, item # AM3100, will be the same as turning and backing with a gooseneck hitch in the bed of your truck. The ride quality of using a fifth wheel to gooseneck adapter usually is a bit worse than towing a gooseneck trailer with the same trailer weight and tongue weight. Usually fifth-wheel trailers will tow better and ride better with a fifth-wheel hitch due to the pin box configuration and fifth wheel hitch design....
    view full answer...
  • 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.
    view full answer...
  • 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...
    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...
    view full answer...
  • How to Tow a 5th Wheel Trailer with a Gooseneck Trailer Hitch with a 2009 Chevy Duramax Long Bed
    It sounds like you will need something like the Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter, # AM3100. What this adapter does is allow you to pull a 5th wheel trailer that has a pin box, with a gooseneck hitch like you have in the bed of your 2009 Chevy Duramax. To find the correct size, after backing the vehicle under the trailer, measure from the top of the ball on the truck to the base of the pin box on the trailer. This will tell you what height adapter you will need....
    view full answer...

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