bing tracking image
  1. Gooseneck and Fifth Wheel Adapters
  2. Andersen
  3. Fifth Wheel Trailer to Gooseneck Hitch
  4. Bolts Over King Pin
  5. 24000 lbs GTW
  6. King Pin Adapters
Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter

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

Item # AM3100
lowest price pledge
Our Price: $550.94
You Save: $31.32
Gooseneck and Fifth Wheel Adapters
This item qualifies for Free Shipping
Shipping Weight: 44 lbs
In Stock
Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter Fifth Wheel Trailer to Gooseneck Hitch AM3100
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Need help with installation?
Locate installers near me
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. Guaranteed Lowest Price and Fastest Shipping for Ranch Hitch Universal 5th-Wheel-to-Gooseneck Coupler Adapter. Gooseneck and Fifth Wheel Adapters reviews from real customers.
  • All Info
  • Reviews (97)
  • Q & A (0)
  • Photos
  • Why etrailer?

Andersen Gooseneck and Fifth Wheel Adapters - AM3100

  • Fifth Wheel Trailer to Gooseneck Hitch
  • Bolts Over King Pin
  • 24000 lbs GTW
  • Andersen
  • King Pin Adapters
  • Adjustable Height
  • Adapts Trailer
  • 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 Reviews

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

Average Customer Rating:  4.6 out of 5 stars   (97 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.


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

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


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


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


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


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


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.


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

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.

-- Etrailer Expert Patrick B - 11/26/2013


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.


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!!!


It fit on the trailer very good and was easy to install


This is the second time I have purchased the same thing and it went very well each time.


It is so good to see that there is still good customer service, the product was just what I need and affordable as well.


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!


Installed on my fifth wheel. Easy to follow instructions, total time was about an hour. The lock is easy to place, install and use.
Be advised: if your king pin box is enclosed, you will need to weld this product on.


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!


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 !


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.


Easy install and setup. Fit 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.


I bought this adapter again because I had one on a previous trailer - and it worked great.

I like that it screws on rather than only bolting on. Then I really know it's secure.


The hitch was shipped the same day it was ordered. It arrived in five days in excellent condition and with no parts missing. It took me longer to install it because I had to remove the king pin box component to drill the bolt holes and mount the bolts to provide the additional support I wanted. An excellent product and a good price.


Quick and easy


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.....

Show More Reviews

Ask the Experts about this Andersen Gooseneck and Fifth Wheel Adapters

  • 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....
    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...
    view full answer...
    Image 1 for
  • 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...
    view full answer...
  • 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...
    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...
  • 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.
    view full answer...
  • 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.
    view full answer...
  • 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.
    view full answer...
  • 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...
    view full answer...
  • 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...
  • 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...
  • 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,...
    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...
    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...
  • 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...
  • Is Gap Between Camper Bottom And Top Of Truck Bed Side Rails A Concern
    When a camper is loaded on a pickup truck bed there will be a gap between the truck bed rails and the underside of the camper as you show in your photo. No worries there. For your camper tie-downs, it loos as though you have attached the rear ones just as they are designed and if the front tie-down is attached to something strong enough you will have no problems. It actually looks like the eyebolt that is normally used for the front tie-down would be behind the stake pocket tie-down and...
    view full answer...
    Image 1 for
  • How to Remove the Ranch Hitch Fifth Wheel Adapter 3100
    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 two full grown...
    view full answer...
    Image 1 for
  • Diameter of the Mounting Surface of the Ranch Hitch Adapter part # AM3100
    I went and grabbed a Ranch Hitch part # AM3100 from our warehouse to measure the diameter of the plate that would attach to the pin box of your trailer and found that it measures 9-3/4 inches across.
    view full answer...
    Image 1 for

< Previous
123. . .14

Do you have a question about this Gooseneck and Fifth Wheel Adapter?

  • Why

    At we guarantee:
  • Highest quality gooseneck and fifth wheel adapters for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate gooseneck and fifth wheel adapter information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Sarah L
Expert Research:
Sarah L
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Reno H
Expert Research:
Reno H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Jeff D
Installed by:
Jeff D
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.