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  1. Gooseneck and Fifth Wheel Adapters
  2. Reese
  3. Fifth Wheel Trailer to Gooseneck Hitch
  4. Replaces King Pin
  5. King Pin Adapters
  6. Adapts Trailer
Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 and 0719 - 20,000 lbs

Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 and 0719 - 20,000 lbs

Item # RP94720
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Our Price: $1,710.99
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Gooseneck and Fifth Wheel Adapters
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Shipping Weight: 195 lbs
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Tow your fifth-wheel trailer with your gooseneck hitch and get the smooth, stable ride that only an air-ride-equipped coupler can deliver. This trailer coupler adapter has a built-in air bag that provides cushion and absorbs road shock. 1-833-496-1390 to order Reese gooseneck and fifth wheel adapters part number RP94720 or order online at Free expert support on all Reese products. Guaranteed Lowest Price and Fastest Shipping for Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 and 0719 - 20,000 lbs. Gooseneck and Fifth Wheel Adapters reviews from real customers.
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Reese Gooseneck and Fifth Wheel Adapters - RP94720

  • Fifth Wheel Trailer to Gooseneck Hitch
  • Replaces King Pin
  • Reese
  • King Pin Adapters
  • Adapts Trailer

Tow your fifth-wheel trailer with your gooseneck hitch and get the smooth, stable ride that only an air-ride-equipped coupler can deliver. This trailer coupler adapter has a built-in air bag that provides cushion and absorbs road shock.


  • Air ride coupler lets you tow your 5th-wheel trailer with your gooseneck hitch
    • Goose Box replaces standard pin box on 5th-wheel trailer
    • Endorsed by Lippert Components Inc. - will not affect the warranty on their trailer frames
  • Fully enclosed air bag and dual shock absorbers provide cushion and absorb road shock
    • Improves handling and overall ride
    • Decreases both vertical shock (bounce) and longitudinal shock (chucking)
    • Limits strain on truck and trailer frames
  • Sturdy steel is powder coated for corrosion resistance
  • Pivot tube helps to minimize jarring by allowing fore and aft movement
  • Simple, bolt-on installation
    • Mounting hardware included


  • Designed to replace Lippert 1621, 1621HD, and 0719 pin boxes
  • Towing capacity: 20,000 lbs
  • Tongue weight capacity: 4,000 lbs
  • Ball size: 2-5/16"
  • Limited lifetime warranty

Note: Lippert pin box 1716 will work with this goosebox, but a spacer kit (RP61301 - sold separately) is required.

Fifth-Wheel-to-Gooseneck Adapter

This unique coupler lets you tow your fifth-wheel trailer with your gooseneck hitch. It is air ride equipped to ensure that less stress is put on your trailer's frame than is typical with traditional king pin adapters. Simply replace your trailer's existing pin box with the Goose Box and you'll be ready to go.

Eliminate Chucking and Jarring

The Goose Box is designed to absorb road shock for a smooth, stable ride. The internal air bag can be adjusted to give you just the right amount of support, so you will lose the bounce but avoid the stiff, rigid ride that occurs when towing with an overinflated air bag. Also included in the Goose Box are dual shock absorbers, which extend the life of the air bag by ensuring that compression occurs in a controlled fashion.

Cutaway Diagram of Reese Products Goose Box
  1. The air bag can be adjusted to provide a smooth ride for both your truck and trailer. Because it is fully enclosed, it's protected from UV exposure and shielded from road hazards.
  2. Dual shock absorbers help to reduce bounce and relieve stress on your trailer frame.
  3. The integrated pivot tube allows the Goose Box to move fore and aft, minimizing chucking.
  4. The gooseneck coupler attaches to the 2-5/16 inch ball on your gooseneck trailer hitch.

94720 Reese Products GooseBox - Fifth Wheel Trailer to Gooseneck Trailer Hitch Coupler

Replaces Reese 94623

Installation Details RP94720 Installation instructions

Customer Reviews

Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 and 0719 - 20,000 lbs - RP94720

Average Customer Rating:  4.8 out of 5 stars   (241 Customer Reviews)

Tow your fifth-wheel trailer with your gooseneck hitch and get the smooth, stable ride that only an air-ride-equipped coupler can deliver. This trailer coupler adapter has a built-in air bag that provides cushion and absorbs road shock.


This Goosebox is heavy but I was able to get it installed by myself with help from my wife while tightening the bolt. When UPS freight delivered this, the driver was kind enough to load it directly into my truck so I did not have to lift it up. Using my truck I was able to back it into position where it went in effortlessly. I first took the zirk fitting out so I did not break it. The Goosebox was shored up using 2X4 pieces and then strapped in place, so it was in position while backing it up to the fifth wheel. This is a well made and stout pinbox replacement. The one issue I do have is that the air inflation gauge is very hard to see. Basically it is a black bar inside a black hole. The next time I am hooked up, I intend to put some white or other bright colored paint on the bar for easier viewing. No more lifting the heavy hitch to of the bed to use the truck. As always etrailer is hard to beat, fast shipping, expert advice, great prices.

After a year now, I can say this was a great move for me. It functions flawlessly with no chucking or clanking of any kind. Just be sure not to over inflate.
Donald - 08/13/2022


Overall a great upgrade, but not perfect.
Happy to have gone this way from the previous 5th wheel hitch setup.

* Having nothing in the bed of the truck, except when towing.
* There is more room for a larger bed chest without the 5th wheel hitch (replaced a B&W Companion slider).
* Air bag system seems less jarring on the frame of the 5th wheel than the B& W Companion / Lippert Rotaflex.
* Seems to have reduced further what little "chucking" there was with the Companion/Rota-Flex setup.

* Lining up to hitch is a PITA. Reese should really rethink this.
* Towing is not as confidence inspiring. The trailer feels like it wallows in rough undulating turns in comparison to the 5th wheel connection.
* Sits much lower than the 5th wheel pin box, so at level RV sites the bottom of the hitch is lower than the truck bed. That affects the length of RV site needed as the truck can't back under the trailer to park.
* The pinbox structure requires more room in the bed, limiting what can be placed on the sides & rear of the bed.

To help with hitching, I'm going to make a magnetic "sighting" system that can be seen through the rear window. something that can be tossed in the bed chest when not in use. Currently I'm using the bed camera (in the CHMSL) along with a camera that I set on the wheel well, and that is marginal at best. It still takes multiple attempts because of the limited tolerance. Once the bed chest is installed the camera will be pretty ineffective.


IF you have a gooseneck ball and a fifth wheel RV, then this is the perfect match for your rig! The Reese Goosebox changes everything! Easier hook up and unhooking. Smooth ride and easy installation. etrailer has plenty of videos for review and installation, plus you can call them and ask about it if you have any questions. I have had it for a year now and just installed it on its second camper and I would have it any other way! It is exactly what you need!

Love it!
Jesse H - 05/20/2021


I like the Goosebox was easy to install. Took me and wife about 2 hours but I am in my mid 70’s. I used my tractor and loader which took a lot of work out of it.


I installed the reese 20k goosebox yesterday by myself except for a small amount of help from my wife. Install was easy. Haven't had time to try it out yet.

I love the reese goosebox. It may be a little harder to hook up with, but there are ways to help with that 1 is utube. It makes for a much nicer and smother ride compared to the 5th wheel hitch.
Royce - 08/28/2022


I think the Goose Box is a great product. However, I searched on the eTrailer site and found that someone with the same make/model of RV and was guided to a particular Goose Box. I contacted etrailer, provided them with the year, make and model of RV - and asked to confirm if this was the same pinbox and if this particular model of Goose Box was correct and would fit my RV. trailer confirmed, so I placed the order. Unfortunately, in my model year, the pinbox changed and the Goose Box did not fit. etrailer did offer to return the product if I paid approximately $XXX in shipping. Coupled with etrailer sending me the wrong chains - I will look elsewhere for all my future RV needs.

Pin boxes can be different on an RV even if they made by the same manufacturer. The easiest way to determine which pin box you have is by looking on the pin box. There should be a sticker that gives the pin box manufacturers name and the model number. If you cannot find the sticker or it is not legible, another way to find the pin box information is to contact the trailer manufacturer directly. They can determine which OEM pin box was installed on your trailer using the trailers serial number. The final way to determine which pin box you have is by taking a few measurements. I have attached an FAQ article on measuring your pin box as well as a photo showing the measurements you will want to take. Based on the various measurements, we can determine which pin box you have and which replacement air ride pin box will work for you.
-- Etrailer Expert Jenny N - 08/03/2022


This really was a game changer from my conventional hitch set up. No more lifting a heavy hitch receiver out of my truck bed when not in use, and the hitching process is a breeze. No binding or hitch slide issues. The ride was much smoother with the air system. I installed it myself with the help of one other person and didn't have any problems. Have about 6k miles on it now and it's awesome. Worth the money.


I have completed the installation of the Reese Gooseneck pin Box 20K on my 2019 Columbus 1492 366RL. The installation went well for 2 people. The installation was done as suggested in the instructions, one step below the original fifth wheel hitch.
That actually proved to be too high for my 2019 GMC DenaliHD 4x4 DRW so I moved the hitch to the same position as the original equipment and the height works much better. I was able to unbolt and reset the position of the hitch by myself using the truck bed as a "work bench" and raising and lowering the RV to align the holes. Haven't towed it yet but will soon and provide more info. As you can tell by the photos, the safety chain installation was very easy.

The Reese Gooseneck is awesome. Smoother pull and less bouncing. I recommend anyone with a fifth wheel to convert to a reese gooseneck.
John G - 04/04/2020


After being a little hesitant on the purchasing of this item, I did research and pulled the trigger. I am so glad that I did. I love the fact that I could remove the rails in my truck from my 5th wheel. Hooking up the 5th wheel was another concern, as I can not see the goose ball, but proper placement of a car antenna and magnet allowing me to see the center line of my truck and camper and as soon as the hitch hits the antenna I am centered over the ball. I love it.


One of the best purchases I have ever made when it comes to towing a fifth wheel.

One year later and still very glad I made the switch. I have had to re-inflate the air bag a few times, but I have no regrets whatsoever about this purchase.
Jeremy - 08/12/2022


This thing is great! Install was a breeze took about 2 hours to install taking my time and torque. All I did was sat the pin box up on cardboard and wooden blocks, then slid the pin box under the king pin when it was close enough. A buddy and I installed it.

Towing is very smooth and nice and easy. No bucking.

Everything is great with this gooseneck pin box. I'm extremely happy and I'm even at the camp site right now reviewing this! Thanks etrailer.


Improved ride, no hitch in the box of my truck!


I had this hitch delivered to my RV dealer for installation. I failed to give them instructions or link to video, and there were no instructions in the box. However, it was a pretty straightforward install. I picked up the RV, aired the bag to “half” on the indicator and it rode like a dream… as I expected it would. SOO much better than using a fifth wheel to me. But then again, I’m a very strong proponent of goosenecks anyway. Been pulling trailers off and on for… let’s just say over 45 years.


After dealing with the awkward 5th wheel hitch and pin box for many years on several RV's, I decided to try the Goose Box. Absolutely the very best mod I've done on my 2019 Alpine 5th wheel.

Great. Best mod Ive made in a long time.
Sandy C - 06/20/2021


I had changed from a 2500 to a 3500 DRW that happened to include the GM puck system.

I was left with a choice: do I spend hundreds on a puck adapter system to allow my old industry standard rail fifth wheel hitch to work with my new truck? Or do I sell it for as much as I can, and change over to something like the Goosebox?

In the end, I was able to sell my old fifth wheel hitch and purchase this Goosebox, and the difference cost about as much as the adapter would have cost. Furthermore, the bed of my truck is now eternally empty and usable without needing to climb in and disassemble a heavy hitch, and I even lost a bit of weight in the bed.

Yes, the Goosebox is heavy, but it is certainly not heavIER than a normal pinbox plus the weight of my old hitch. If my guess is right, I probably lost 50-100 lbs.

To add to that, once the bag is inflated, the ride is so smooth. It's easily one of the best upgrades I did to my truck and trailer setup.

Yes, hooking up is SLIGHTLY more complex than a traditional fifth wheel, but the time difference is minutes at most. Less, once you get used to it, or you have a good spotter to help.

I kept the old pin box around, because I will want to keep this setup if I ever change trailers!


When I attempted to install this the width was 1/2" smaller than the trailer original. It took me about 15 calls to etrailer, the distributor and back and forth. Finally the distributor gave me the name if the manufacturer. When the women from the manufacturer helping me said, "Let me look at he specs". I knew I had the right person. It was at the limit as far as installing on my trailer.

Now that it's installed I love it.

Albert - 05/06/2022


I have no issues with etrailer, their service is great. Their front line people are very knowledgeable and give immediate answers your questions. They take your orders Leaving you feeling good with your interaction. My three stars are for their shipping. They ship with Estes and it took 17 days to get my product. etrailer, you can do better with your shipping.

Thank you for your review. This item was too large for UPS so it needed to ship freight. Freight does take longer in shipping than UPS. Even if you choose an expedited shipping, our team will call you and let you know that it can not ship expedited.
-- Etrailer Expert Sierra K - 05/19/2021
Great, we truely do enjoy our Goosebox. One import point is remembering to inflate the pin box and grease the locking mechanism. We have had no problems at all. Very well built and easy to use.
Ernie - 04/13/2022


After one year of use the Goosebox has been a joy to pull with. Initial hookup is a learning curve compared to a traditional 5th wheel hitch but simple and quick after a few trips. Found a bed mounted camera eases the hookup process and
love the open space of our truck bed when unhooked!


Ordered this to replace OEM king pin on my 2019 Solitude 375RES. Due to it being delivered via freight it took a little longer than expected, had to make an appointment to have it delivered, not to big of a deal. The cardboard this comes in is very hefty, as it should be for the weight of the item. As stated by other, there was not any instructions included, easy to find online though. I am not the mechanical type but a little handy with basic tools and it took me about 2.5 hours, this includes taking the old pin box off. Watched a few videos on how people used wood blocks and used the tailgate of the truck to install. I was worried about braking the zerk fitting off so I attached the couple to my goose ball. I than used blocks of wood to shore it up and used the truck and the fifth wheel to line it up. Hooking up is easy. On my test drive I can tell this will handle better, did not have as much chucking as with the fifth wheel hitch. Looking forward to our next camping trip to give it a true test.


I unpacked it recently and found there are two Allen head bolts on top of Goode box, one of them looks like it was cross threaded at the factory, has not been resolved yet.

I see in your account that the manufacturer is sending you some new hardware.
-- Etrailer Expert Sierra K - 07/06/2022


Received in good order.
Easy to install,
you do need two people to install . Heavy.
one problem, the grease fitting was not installed properly . it came with an insert grease fitting. the whole was a threaded hole . I bought a Grease fitting and screwed it in. Before fixing it I called etrailer and told them about the grease fitting. they said it was a defective unit and they would ship me a new one. problem was I had already installed this one. I was not going to uninstall and reinstall another unit just for a grease fitting. this is why I purchased my own fitting and installed it.


It has worked exactly as expected, very happy with it!


I finally reached the point where I could no longer remove my standard fifth wheel hitch by myself. My only option was to leave my hitch in the bed of my truck for the entire travel season, April to October for us. Not a good thing when I needed my full bed. After hours of research the Goose Box seemed to be my best option. I had put the Box on our previous fifth wheel but didn't tow it much before we traded it for a 2020 Jayco Pinnacle. I had the dealer change the Box over to the new Jayco. It is by far the best towing, best riding and best handling fifth wheel/truck combo we have ever owned, and that has been a few. Our 2020 F350 has the camera system which makes hookup relatively painless. The 5 pound ball is so much easier to remove than a 200 pound hitch. Well worth the money and highly recommend it.


Hitch set up is great, well built, and frees up a lot of room in the back of the truck when not towing. The instructions help get it installed with a lot of adjustment for different platforms but YouTube helps figure out how to use it. Ordering is an issue, the estimated arrival date isn’t even a guess. It’s a freight delivery so don’t expect it anywhere near the estimate shown on the site. Your purchase goes in a que that could be backed up which should be communicated before you purchase it but it’s not.


I installed this hitch, in less than 1.5 hours with a little help. hooked up to my truck and pulled my toy hauler. I could not believe the difference. the only complaint is there was only 4 bolt/nut/washer assy. which is legal, and plenty strong. so I used a couple of the old bolts. I did not like the 4 empty holes

Show More Reviews

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

  • How to Figure Out Which Reese Goose Box Fits Fifth Wheel Trailer
    If you check out the sticker or plate on the pin box of your trailer currently there will be a model number listed that will help us identify what pin box you have and then from there pick out the correct Goose Box. If not there is a way you can measure your pin box to determine what you have. I attached a help article that covers this. The two Goose Box part numbers you mentioned both are for the same fit, but the # RP94720 is the updated version of the 94623. Essentially it's a beefed...
    view full answer...
  • Determining Pin Box Model on 2006 Holiday Rambler to Find Correct Reese Goose Box Replacement
    There is a way for you to determine what model pin box you have on your Holiday Rambler Next Level 38CKS but unfortunately I wasn't able to find this information. I even reached out to Holiday Rambler but they were not able to give me any specifics regarding this trailer without the VIN. On your existing pin box there should hopefully be a sticker right on the unit itself that indicates its model. If you can't locate any information on the pin box then you can either take a few measurements...
    view full answer...
  • What Generation is the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler RP94720
    Yes, the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter part # RP94720 is the 2nd generation which has an improved airbag design that does not require there to be any pressure in the system to operate, a new schrader valve design to prevent leaks, and a sleeker look overall. The locking cable also has a bit more tension than the previous version which are all complaints they had of the original and were then addressed with the new model.
    view full answer...
  • Correct Reese Goose Box 5th-Wheel-to-Gooseneck Adapter for Lippert 1621 Pin Box
    I reached out to Lippert and was told you have a Lippert 1621 pin box, so the correct Goose Box for your 2019 Grand Design Solitude is the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94720, which has a 20,000 lb capacity. Additionally, you will not need to use the spacer kit to install this adapter. I have added a link to a video review for you to check out.
    view full answer...
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  • Can Air be Left in Reese Goose Box When Trailer is Stored
    It's perfectly fine to leave air in the bags of the Reese Goose Boxes like the part # RP94720 when storing the trailer. It will not have any effect on the air bags or seals. You'd want to check the air pressure setting before towing like you normally would and inflate/deflate as needed when you take the trailer out of storage.
    view full answer...
  • Will Reese Goose Box # RP94720 Work on Flat Bed with Recessed Gooseneck Ball
    The Reese Goose Box # RP94720 that you referenced should work just fine with the recessed gooseneck ball on your flat bed truck but there are a couple of measurements I recommend taking to verify this. The Goose Box measures 7-1/2 inches at its widest point when taken 4 inches up from the bottom of the coupler (where it actually clamps around the gooseneck ball). You can use this information to make sure the recessed area is large enough to avoid any interference issues with the Goose...
    view full answer...
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  • Which Reese Goose Box Fits 2020 Grand Design Momentum 351M
    Your 2020 Grand Design Momentum 351M has a Lippert 1621 pin box so for a Reese Goose Box you'd want the part # RP94720 which you did reference.
    view full answer...
  • Will the Reese Goose Box RP94720 Fit a Montana 3931fb?
    The Reese Goose Box # RP94720 is specifically designed to fit the Lippert 1621 and 0719 pin boxes, so you will need to confirm your pin box number before moving forward. This can be easily done by contacting the manufacturer of your trailer to ask which was used. All you will need is the VIN and they should be able to tell you as they keep this on file. In the off chance they cannot tell you, there are other ways to verify which one you have. First will be to check your pin box for a label....
    view full answer...
  • Recommended Reese Goose Box Fit for Lippert 1621HD OEM Pin Box
    If your 5th wheel is equipped with a Lippert 1621HD pin box, it would be compatible with the # RP94720 Reese Goose Box model you'd looked at. You can confirm fit by measuring the center to center bolt hole distance and width of the pin box itself, then compare your measurements to the diagram I've provided for you. If they match up, you do indeed have a Lippert 1621HD pin box, and the # RP94720 would work great for you.
    view full answer...
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  • Can a Lippert Turning Point Pin Box be Replaced With a Reese Goose Box?
    From what I could find, the weight differences between a 16k Reese Goose Box # RP94720 and a 16k Lippert Turning Point will match each other. However, with how the Lippert Turning Point pin boxes are attached to the frame, they do not use a standard pin box number and cannot be replaced, unfortunately. I spoke with Lippert and they did confirm that is is a stand alone, proprietary pin box that they use for the Turning Point systems.
    view full answer...
  • Will the Reese Goose Box RP94720 Fit a 2021 Keystone Cougar 364BHL?
    Installing a Reese Goose Box is definitely a popular upgrade. That being said, the # RP94720 is specific to the Lippert 1621 and 0719 pin boxes, so you will need to confirm your pin box before purchasing. Your specific pin box number can easily be verified by contacting the manufacturer of the trailer. All you will need is the VIN and they should be able to tell you as they keep this on file. This is always my first suggestion as it is by far the easiest and quickest way. In the off chance...
    view full answer...
  • Gooseneck Adapter for 2021 Grand Design 337RLS
    To convert the pin box of your 2021 Grand Design 337RLS you'd need the part # RP94720 since your trailer has a Lippert 1621 pin box.
    view full answer...
  • Determining Which Reese Goose Box Fits A 2018 Jayco Eagle 321 RSTS
    I would be happy to help you find the correct Reese Goose Box for your 2018 Jayco Eagle 321 RSTS but unfortunately we do not have a break down of the specific components your trailer uses so we will need to identify which pin box your trailer has. Check your pin box for a white sticker with a four digit number like 1716 or 1116. If you cannot find such a sticker just send me a picture of the sticker on the pin box that has the serial number and I can use that to identify it. For an example...
    view full answer...
  • Correct Goose Box for Cedar Creek Hathaway Edition 38FBD
    The Cedar Creek Hathaway Edition 38FBD likely uses a Lippert 1621 HD pin box. If this is correct then the correct Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter is part # RP94720. That said, you will want to verify the model number of the current pin box by looking for the info sticker on the side of the wings.
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  • Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter
    If you let us know what pin box is installed on on your RV we can better recommend the exact options that will fit. We have options such as the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter, # RP94720. I think the situation is probably that you have the X5 that is for 2016-2019 models. Currently there is not one for OEM for 2021 GM OEM. You would have to change your entire under-bed gooseneck set-up and I doubt you want that expense when there are other more cost effective...
    view full answer...
  • Reese Goose Box for Grand Design Momentum 397th
    Your Grand Design Momentum 397th has a 1621 pin box currently so the 20 Reese Goose Box part # RP94720 would be the correct fit. Since you have a 20k GVW and this has a 20k capacity it would work perfectly together.
    view full answer...
  • What Thread Size Grease Zerk Does Reese Goose Box Coupler Adapter # RP94720 Use?
    I reached out to my contact at Reese and the grease zerk on the bottom of your Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 and 0719 - 20,000 lbs # RP94720 has a thread size of 6mmx 1.0. Once you get the broken zerk out you will be able to easily replace it, however we do not currently offer this size of replacement grease zerk so you will need to pick one up from a local auto parts store as they should have them in stock. I included a video review of...
    view full answer...
  • Identifying Lippert Pin Box Item Number 736262 to Pick Out Goose Box
    I sent the sticker on your pin box to Lippert and they were able to determine that what you have is a Lippert 1621 which the Reese Goose Box part # RP94720 that you referenced would fit.
    view full answer...
  • Which Capacity Reese Goosebox for Toy Hauler with GVWR of 20k
    Since the GVWR of you toy hauler is over 16k but under 20k you'd want to go with the 20k version of the Reese Goosebox part # RP94720.
    view full answer...
  • Compatibility of Reese Goosebox RP94720 with Recessed Gooseneck Ball
    Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler # RP94720 is a direct replacement for the Lippert 1621, 1621HD and 0719 5th wheel pin boxes. It will work on a recessed ball as long as the recess opening is 8 x 8-inches or larger and no deeper than 6-inches. If you refer to the linked photo you'll see that at 4 inches up from the very bottom (where the Goosebox clamps around the gooseneck ball) the clamp mechanism is 7-1/2 inches at its widest point.
    view full answer...
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  • Is There Kit to Allow Stable Air Pressure in Reese Goose Box
    There is not an optional hose kit that allows the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94720 to keep pressure applied at all times because as you can see by the cut out of the linked instructions, there is an automatic air relieve valve and air automatically releases, so if there was something that was always applying pressure the valve would essentially constantly be releasing air. It may be that there is a leak, and you can determine if and where the leak...
    view full answer...
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  • Dimensions of Reese Goose Box 5th Wheel to Gooseneck Adapter # 94720
    If you take a look at the dimensional drawing of the Reese Goose Box # RP94720 I attached, you can see that it measures 18.56 inches from the middle of the bottom bolt hole and the bottom of the coupler where the ball connects, so not the "knuckle" that you correctly stated makes it slightly lower. The 22.83 inch overall height dimensions is also from the bottom of the coupler where the ball connects and excludes the aforementioned knuckle. In regards to the last dimension you asked about,...
    view full answer...
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  • Correct Reese Goose Box to Replace Rota-Flex 160468 Pin Box
    Based on my research your Rota-Flex model 160468 pin box was designed to replace the OEM Lippert model 1621 unit. With this in mind the correct Reese Goose Box for your 5th wheel camper is the part # RP94720. This will absolutely provide you with a better ride experience not only because it actually replaces your existing pin box instead of simply adding on another component like with your Convert-A-Ball adapter, but its fully enclosed air bag will also provide additional cushion and...
    view full answer...
  • Reese Goosebox Loses Air After Sitting for a Few Days
    There should not be a loss of air pressure with your Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter like part # RP94720. If this is occurring then that means you have a leak somewhere. In order to find this leak you will want to inflate the system and then spray down the airbag and fittings with soapy water. If you see any bubbles forming then that means there is leak. If you can let me know which part is leaking I can see about getting you replacements (if available).
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