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  1. Gooseneck and Fifth Wheel Adapters
  2. Gen-Y Hitch
  3. Fifth Wheel Trailer to Gooseneck Hitch
  4. Replaces King Pin
  5. King Pin Adapters
  6. Lippert 1621
  7. Lippert 1621HD
Gen-Y Hitch Shock Absorbing 5th Wheel-Gooseneck Pin Box - Lippert 1621/1621HD - 30K GTW - 5.5K TW

Gen-Y Hitch Shock Absorbing 5th Wheel-Gooseneck Pin Box - Lippert 1621/1621HD - 30K GTW - 5.5K TW

Item # GY36FR
Our Price: $1,632.54
You Save: $249.13
Gooseneck and Fifth Wheel Adapters
Shipping Weight: 175 lbs
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This shock-absorbing pin box works with your gooseneck hitch to give a smooth ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. Manual latch allows for simple hookup. 5.5K pin weight. 1-800-940-8924 to order Gen-Y Hitch gooseneck and fifth wheel adapters part number GY36FR or order online at Free expert support on all Gen-Y Hitch products. Great prices and Fastest Shipping for Gen-Y Hitch Shock Absorbing 5th Wheel-Gooseneck Pin Box - Lippert 1621/1621HD - 30K GTW - 5.5K TW. Gooseneck and Fifth Wheel Adapters reviews from real customers.
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Gen-Y Hitch Gooseneck and Fifth Wheel Adapters - GY36FR

  • Fifth Wheel Trailer to Gooseneck Hitch
  • Replaces King Pin
  • Gen-Y Hitch
  • King Pin Adapters
  • Lippert 1621
  • Lippert 1621HD
  • Adapts Trailer

This shock-absorbing pin box works with your gooseneck hitch to give a smooth ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. Manual latch allows for simple hookup. 5.5K pin weight.


  • 5th-Wheel-to-gooseneck adapter box lets you tow your 5th-wheel trailer with your gooseneck hitch
    • 5th-Wheel pin box replaces the factory pin box on your trailer
    • Coupler attaches to your truck's gooseneck hitch ball
  • Shock-absorbing design ensures a smooth, steady ride
    • Technology functions like a torsion axle to limit transfer of road shock from trailer to truck and vice versa
      • Reduces chucking and rough fore-and-aft motion
      • Limits bounce and jarring up-and-down motion
    • No airbags to maintain and fewer moving parts to repair or replace than with other shock-absorbing solutions
  • Coupler socket secures to hitch ball with pin-style latch
  • Pin weight scale is built in to help you balance your trailer
    • Meter lets you know if your load needs to be adjusted before you tow
  • Cross-shaped holes provide attachment points for safety chains
  • Heavy-duty steel construction
  • Powder coat finish resists wear and corrosion
  • Simple, bolt-on installation
    • Mounts with existing bolts
  • Made in the USA


  • Designed to replace Lippert 1621 and 1621 HD 5th-wheel pin boxes
  • Towing capacity: 30,000 lbs
  • Pin weight capacity range: 3,500 lbs - 5,500 lbs
  • Ball size: 2-5/16"
  • 5-Year limited warranty


  • In order for the pin box's shock absorption to work correctly, make sure your pin weight is within the pin weight range.
  • To calculate correct towing weight for Gen-Y hitches, use this formula: GVWR x 0.22 = TW.
  • Because the Gen-Y Hitch Executive is shorter than the Lippert 1621 or 1621 HD pin box, the clearance between your trailer and tow vehicle during turns might be reduced.

Calculated Tongue Weight Executive Tongue Weight Capacity Required
1,600-2,599 lbs 3,500 lbs
2,600-3,599 lbs 4,500 lbs
3,600-4,599 lbs 5,500 lbs
4,600-5,599 lbs 6,500 lbs
5,600-6,599 lbs 7,500 lbs
6,600-7,599 lbs 8,500 lbs
7,600-8,599 lbs 9,500 lbs

Fifth Wheel to Gooseneck Adapter

Say your truck has a gooseneck hitch for towing your horse trailer, but you want to go camping with your new fifth wheel. You could outfit your truck with a new fifth-wheel hitch that attaches to your existing gooseneck hitch, but that means having to move a heavy, bulky hitch into and out of your truck bed all the time.

You could also purchase an adapter that bolts onto your trailer's existing pin box. But adding a new component to your setup can keep your pin box from working how it was designed. King pin adapters can create a stiff ride and can even strain your fifth wheel's frame by adding too much height at the connection point.

A better option is to use this gooseneck-compatible pin box to easily tow your fifth-wheel trailer with your truck's gooseneck hitch. The box replaces your trailer's existing pin box, which means it's designed to act as a part of your trailer instead of simply bolting over your king pin like an adapter does.

Built-In Shock Absorption for a Smooth Ride

Executive torsion

If you've ever towed a fifth-wheel trailer before, you're no stranger to road shock. Driving over uneven terrain can result in a rigid, bumpy ride. And uncomfortable fore-and-aft chucking can occur when you're starting and stopping. When all of the motions combine, the road shock can even potentially damage your truck or trailer.

This Gen-Y Hitch torsion pin box is designed to absorb road shock at the connection point to create a safe, smooth ride. This is thanks to the internal construction of the box, which is similar to that of a torsion axle.

Pivot points are built into the Gen-Y pin box adapter. This allows for movement between the box, which attaches to your trailer, and the coupler tube, which connects to the gooseneck hitch ball in your truck bed. When your trailer bounces or jerks, the coupler tube will move accordingly.

torsion diagram

Built into the Gen-Y pin box are tubes with inner bars that are surrounded by rubber cords. As the coupler end moves, these inner bars twist inside of the tubes, attempting to follow the coupler's motion. But the rubber cords prevent the bars from twisting too far. And as each bar turns, these cords compress to absorb the rough shock. This means that any shock experienced by your truck can be absorbed before it reaches your trailer, and the shock experienced by your trailer won't get transferred to your truck.

Easily Check Your Vertical Load


The vertical load, or pin weight, refers to the weight that a fully loaded trailer exerts downward on the hitch ball in the truck bed. Too little vertical load can cause trailer sway and too much can cause poor performance.

This Gen-Y pin box has a built-in scale so that you can check to see if your vertical load is too high or too low. The red section on the top of the scale indicates your maximum vertical load (5,500 lbs). The red section on the bottom of the scale indicates no vertical load (0 lbs). For the built-in shock absorption to function effectively, the scale's white indicator marker should be within the green section when you hook up your trailer to tow.

GH-8065 GenY Hitch Executive Fifth-Wheel King Pin to Gooseneck Converter with Manual Latch Coupler - LCI 1621/1621 HD - 30,000 lbs

Customer Satisfaction Score:

Customer Reviews

Gen-Y Hitch Shock Absorbing 5th Wheel-Gooseneck Pin Box - Lippert 1621/1621HD - 30K GTW - 5.5K TW - GY36FR

Average Customer Rating:  4.6 out of 5 stars   (219 Customer Reviews)

This shock-absorbing pin box works with your gooseneck hitch to give a smooth ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. Manual latch allows for simple hookup. 5.5K pin weight.





The Gen-Y gooseneck has been excellent! I now have approximately 12k miles on mine and it rides very nicely with very limited chucking and handles rough roads very well. I’d highly recommend that you contact Gen-Y BEFORE ordering to ensure you get the correct load rating product. Gen-Y and Etrailer have provided excellent customer and tech support! This product definitely frees up your truck bed and does require a precise line up to hitch.


I love this hitch I put it on my 35’ Astoria fifth wheel it pulls great and the shock absorbers help with a smooth ride.we took a ten day trip from Ga to Maine last September and had no problems with this hitch. I guess the only negative is that it’s not as easy as a regular fifth wheel hitch to hook up by yourself but after a few times you can line it up ok. The best thing is that no big hitch taking up space in my truck bed just a ball


Makes life a lot easier l don’t have to remove my hitch from the bed of my truck to use it. Just flip the ball and there you go.
The gooseneck hitch actually pulls better than the 5th wheel hitch I had.
It is rather heavy so come up with a good plan for installing, I used the front end loader on my tractor which allowed me to do the install by myself.
Great product!!!


I’m really happy with my purchase. Please take into account that this hitch is 2-3” shorter than the kingpin box. They do make an extended version. I had to buy a 4” ball offset, as I couldn’t open my tailgate Without hitting the camper. I love having the open bed space, it seems to be smoother and it’s less noisy then the pin box.


This product is a chucking ENHANCER, not a chucking dampener. Additionally, despite what you have read, my experience with GenY customer service has been terrible. GenY will not support their warranty program, they will try to tell you everything is OK, when the fact is, their product is faulty and does not function to GenY product literature statements “Built-In Suspension Creates Up to 90% Smoother Ride”.
I purchased the GenY executive hitch from eTrailer on 3/10/23, etrailer sent the wrong unit and to etrailer’s credit - they quickly took responsibility and replaced with the correct unit on 3/24/23. I installed on my DRV Elite Suites PS3 just in time to attend the SOITC rally at the Outer Banks on 4/13/23. When we left for this 750-mile one-way trip, the GenY load indicator was in the middle of the green zone, I measured the pin load at 5,200 pounds. Bedrail clearance was my reason for buying the GenY, it replaced a Trail Air on my DRV and a Reese 27,000-pound hitch on my 2022 F450. Bottom line, the GenY system provided no improvement in bedrail clearance, but did offer the ability to switch in different gooseneck balls to adjust for bedrail clearance.
GenY states that a 1,000-mile break in period is required before the GenY torsion system is fully effective. My experience was that at 750 miles the torsion system on the GenY had sagged to it lowest point with the load indicator in the unit outside of the green, this also resulted in losing nearly two inches of bedrail clearance. It looks like it has a metal-to-metal stop so that the lowest the indicator will go is to the white lines outside of the green. I called GenY from the RV park and was told that the unit would not sag further. I purchased a Curt gooseneck ball which was 2 inches higher than the Ford ball to regain bedrail clearance having to rapid ship it to the RV park.
Chucking became downright scary on the 750-trip home. As an example, chucking was induced every time my truck’s ten-speed transmission shifted up. Upon arrival home, I again contacted GenY customer service with a full expectation that GenY would replace the unit. Instead, here is their response: “I spoke with our QC Manager regarding your hitch. He said that you are in the correct unit and being at the top end of the green is normal after the break-in miles. As for the bedrail clearance he said that you would be able to lower the pin box down a set of bolts (with our pin boxes you are only required a minimum of 4 grade eight bolts per side) or use a B&W ball as they are roughly 1 1/2” taller.” This is unacceptable...


Best upgrade I have done on my RV. Hitching up a gooseneck is a little more difficult but well worth it. It allowed me to remove the large heavy 5th wheel hitch out of the bed of the truck. I love the damping of the trailer bouncing. This hitch allows my RV move with the truck and I don’t feel that bounce of the truck is passed to the RV hitch like it was with the 5th wheel hitch. Hitch is heave and it really would help to have two people to install it. I’ve done it twice. Once with help and once without. Using the bed of the truck and a lever I was able to install the hitch myself.


Quality build, easy install, let your truck and trailer do the heavy lifting. My wife and I did this install and took about an hour to get it bolted. I also bought the Grade 8 bolt kit. I’m hauling 20K GTW. The original hitch had Grade 5 bolts and only 5 per side. Now I have 6 per side, on bolt torque


This was the perfect replacement for my 5th wheel king pin. It was easy to install and has a much smoother ride! I would definitely purchase this again!


Because of my bad back I replaced my B&W Companion hitch & Lippert Rota Flex hitch pin which I loved using. There is a learning curve with hitching a gooseneck trailer but with some reflective tape on the center line above the coupler on the gooseneck and a telescoping yellow ball hitching aid with a magnetic base on the truck bed just in front of the ball. This hitch setup is softer and smoother towing than my old setup and I have about 5k miles of use.


The toy hauler pulls so much smoother. I wasn’t expecting to increase my MPG but, I gained a 1/2 mile per gallon. Dealing with etrailer was great as usual.


Just wanted to give you a heads up, hitch just arrived as promised. Packing could have been a bit more effective as it is apparent that its been dropped unfortunately it broke the finish in a couple places. I will address it and im not asking for anything as i know your not the shipper. Thanks


The Gen-Y hitch is very stout & well built. Fit & finish was excellent.
Installed myself in about 30 minutes.


Are you kidding ? This has got to be the best hitch setup available on the market of ALL hitches. Fantastic, durable, quiet, no bucking, chucking or issues of any kind. We have a 16,000 lb, trailer and I sometimes forget we are even towing with our 2018 F-450. I have recommended this hitch to everyone and enjoy the "clean" truck bed when not towing.


Just received today after I tracked the whereabouts with not-so-accurate UPS LTL FREIGHT tracking. I difficulty located local freight company that just received this terribly torn up cardboard package with this 205# parcel. Hitch had been placed onto some pallet enroute because it was no longer contained in its GEN Y box. Extent of damage I’ve yet to determine though it has a long and deep gash into the powder coat finish down the exposed side.


Installation was very straight forward, it is heavy so you need something to prop it up for you while you get at least one bolt started in each side. I used the bucket on my tractor to hold it up. I only have one tow in so far for about 50 miles so still early to review. It certainly works as advertised for taking out a lot of the trailer feedback on rough roads, uneven transitions, etc. It is an improvement in ride quality and makes towing a big fifth wheel more comfortable. Necessary? Probably not but it does spoil you a little bit. One problem though that Gen-Y is working on fixing is the ball to pinbox is a little bit longer and I did hit the bed cap at about 60 deg of turn while backing in at an angle. It cleared when I tested it in the flat driveway, but not by much. They are going to come up with a fix. I'm at 7 1/2" clearance from the overhang to the bed caps sitting flat. This is with a '18 Chev Silverado HD 8' bed and a '19 Momentum 351M


2023 Heartland Bighorn 3970FB. Replacing factory Roto-Flex and Anderson Ultimate. The GY66FR packaging was perfect upon delivery. Packaged really well with spray foam around unit.
Removal and installation time was around 1 ½ alone with use of my front end loader. This unit is robust to say the least. Fit and finish is perfect, it bolts right into place.
Glad to have the bed of the truck my truck back. From measuring looks like this will help us with our turning clearance as well.
Will update as we put some mile on this Gen-Y


Seems great just installed hook camper up and took around town pulled great with new hitch


Space saver, back saver, pulls great. The thing saves so much space in your bed, gives so much room while pulling. It saves your back because no more putting the giant heavy fifth wheel hitch in and out of the bed. It pulls great too, pulling my 42' would buy it again for any trailer. Much more solid that the adapters sold.


Works very well. There’s a lot less chucking. I don’t regret buying it. I installed myself. I built a wooden pin box, backed my truck under the pin and lowered the trailer to rest on the wooden box. Braced the back end with 2x4’s and removed the bolts. Reinstalled with the same method. The hardest part was lifting pin boxes in and out of the truck.


Installation took 1 hour with 2 people. Made very well. Pulled trailer great and expect ride to get better with break in. I went with 3.5k and on lighter side of recommended king pin weight. Shipping was quick and had email notifications the whole way. Will use etrailer again


Allows me to tow my 17000 lb camper better and easier than towing my 10000 lb trailer. Removes the jerking between truck and trailer just like they say.


The box for the hitch was absolutely destroyed, the hitch has damage to the powder coat on most sides. Almost no packaging in the box, not sure how you guys pack these but this $[XX] hitch is beat up pretty bad. Really disappointed and i don't have time to had it repowder coated as i am picking up the new camper tomorrow with this hitch and now this one is going to rust.

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Updated by:
Mike S
Employee Michael B
Updated by:
Michael B
Employee Alexander C
Written by:
Alexander C

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