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Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 4.5K TW
(106 reviews)
Price: $1,199.95
In Stock
Gen-Y Hitch
Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 4.5K TW
Part Number: GY78GR
In Stock
$1,199.95
Retail:$1,677.44
You Save: $477.49
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- Reviews (106)
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Gen-Y Hitch 5th Wheel Pin Box - GY78GR
- Lippert Rhino
- 30000 lbs
- Gen-Y Hitch
- Upgraded Pin Box
- Torsion Suspension
- Absorbs Road Shock and Reduces Chucking
- Fixed Turret
This shock-absorbing pin box provides a smooth, safe ride while you tow your fifth-wheel trailer. The all-in-1 box has no air bags to refill or small parts to replace. 4.5K pin weight.
Features:
- 5th-Wheel king pin box upgrades the existing pin box on your 5th-wheel trailer
- King pin inserts into your truck's 5th-wheel hitch
- 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
- Technology functions like a torsion axle to limit transfer of road shock from trailer to truck and vice versa
- Heavy-duty steel construction
- Powder coat finish resists wear and corrosion
- Simple, bolt-on installation
- Mounts with existing bolts
- Made in the USA
Specs:
- Designed to replace Lippert Rhino 5th-wheel pin boxes
- Towing capacity: 30,000 lbs
- Pin weight capacity range: 2,500 lbs - 4,500 lbs
- 5-Year limited warranty
Notes:
- Average break-in period for hitch = 1,000 miles.
- 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 pin weight for Gen-Y hitches, use this formula: GVWR x 0.22
| Calculated Pin Weight | Executive Pin 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 |
Built-In Shock Absorption for a Smooth Ride
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. This allows for movement between the box, which attaches to your trailer, and the king pin, which connects to the fifth-wheel hitch in your truck bed. When your trailer bounces or jerks, the king pin will move accordingly.
Built into the Gen-Y pin box are tubes with inner bars that are surrounded by rubber cords. As the king pin moves, these inner bars twist inside of the tubes, attempting to follow the pin'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.
GH-8051 GenY Hitch Executive Fifth-Wheel King Pin Box with Torsion Shock Absorption - LCI Rhino Box- 30K
Ratings & Reviews
4.7
106 reviews
by:
Michael
10/27/2025
I have now traveled several thousand miles with the Gen-Y hitch installed and have experienced little if any improvement from my old rhino box pin box. I think that once again I have been influenced by the on-line “influencers”, which proves that they have done what they were rewarded to do.
That being said the experience of ordering and shipment along with keeping me informed along the way by etrailer was top notch. I have always had good experiences with etrailer.
Installed myself with no problems but glad I had a tractor to help with the lifting.
That being said the experience of ordering and shipment along with keeping me informed along the way by etrailer was top notch. I have always had good experiences with etrailer.
Installed myself with no problems but glad I had a tractor to help with the lifting.
by:
Steve
02/27/2026
Paired with the curt cross wing and tows excellent makes a big difference definitely recommend this product.
by:
Lyle
02/27/2025
Well made product that definitely absorbs some of the road shock transferred to the fifth wheel.
by:
Michael
06/18/2025
A lot better fit and more secure. Thanks William for all the help. Exact fit the first time.
Brooke M.
6/20/2025
Sounds like you are batting a thousand! Glad William was able to get you to the right hitch. :) When do you get to put it to use on the road?
by:
Bruce
03/16/2026
by:
James C
10/06/2026
On a Montana 294RL after about 500 miles it reduced chucking and smoothed the ride. You can see it flexing in rear view mirror when you hit potholes and bumps. Stuff doesn't come off shelves anymore. Would not be good for toy hauler due to changing trailer weights. Used tractor with forks and a pallet to install. Needs two guys and a spanner wrench as well.
by:
Rick
06/23/2025
We finally got a chance to take the RV out about a 500 mile road trip at first I had my doubts it Chucked real bad right out of the gate but less than 100 miles and it felt pretty good then on the return trip it worked really well. No checking at all. getting ready to take from California to Boston could probably give it a little better review at that time but so far it’s working out great
Brooke M.
6/26/2025
Wow, that's awesome, Rick. Where did you go on the 500 mile journey? When is the Boston trip taking place? I'm glad you are happy with the hitch!
by:
Kenny
09/01/2026
This is exactly what I was wanting. Went on easy. Great fit. Fast shipping!
by:
Doug
05/02/2026
I really can’t tell you anything, have put it on my trailer but haven’t pulled the trailer yet, but a very nice hitch, can’t wait to pull with i
by:
LJ
06/06/2025
The Gen-Y hitch is well built and was easy to install. I haven't towed with it yet, but My expectations are very high that it will perform as advertised.
by:
Allen J
07/10/2025
We went for a 150 mile trip into the Adirondacks for a 3 day vacation and I thought the hitch worked great. We will really test it this winter on a 5000+ trip out west.
Gwendolyn Y.
7/28/2025
Your winter trip sounds like it will be amazing! Where are you going to be traveling to out west?
by:
Mitchell
05/07/2026
I tow with a f-450 this hitch took away the rough ride. Long term probably will save many problems. Well worth the money.
by:
Arris
09/15/2026
Excellent product. Wish I had installed it sooner. Easy to hook up and towing is much smoother!!!
by:
GF
08/06/2023
Simple design, very robust construction, made a vast improvement in towing ride quality.
Easy install by myself, Engine hoist, utility cart and motorcycle jack...ya I have "stuff".
I will need to lower my B&W slide about 2inches to get back to level towing. Calculator that Gen Y has for selecton is spot on , I was a bit worried as my measured tounge weight was 2700 +/- lbs 22% of GVWR (14,400) was 3168 so I ordered the 4.5k model
When hiched for the first time...indicator was in the middle of the green (perfect).
Very happy ... next Im adding shock absorbers to see if i can smooth the trailer hop a bit more.
Easy install by myself, Engine hoist, utility cart and motorcycle jack...ya I have "stuff".
I will need to lower my B&W slide about 2inches to get back to level towing. Calculator that Gen Y has for selecton is spot on , I was a bit worried as my measured tounge weight was 2700 +/- lbs 22% of GVWR (14,400) was 3168 so I ordered the 4.5k model
When hiched for the first time...indicator was in the middle of the green (perfect).
Very happy ... next Im adding shock absorbers to see if i can smooth the trailer hop a bit more.
by:
Den
03/21/2023
Just got my gen y king pin delivered today. It took 4 old men 1 hour to put on using my truck and hitch. Easy installation. I’m a full timer so next month we will see how it rides. I got the gen y because it is 3 inches lower than the rotoflex. It shouldn’t hit my tonneau rails. I’m anticipating being Abe to turn 90 degrees without the pin box hitting my side rails. And it looks tough.
by:
Norm
10/06/2022
WOW Not that I am surprised. etrailer knocked it out of the park again. From the knowledgeable fast and professional help from Representative Joanne K. My buying experience felt like I was buying from a friend. But then after the sale the follow through was unmatched. The GEN Y pinbox I ordered was not in stock but became available much earlier than promised and I got an email notifying me that in was in and being processed. Another letting me know that the item had shipped. Item arrived on time and very well packaged.Excited about getting the pinbox installed I was on my own with no one around. The install went Smooth and easy. Buying from a company that really cares about their costomers is getting to be such a rarity but etrailer went over and above to make my purchase fantastic. The GEN Y pinbox is well made and the fit and Finnish is beautiful. I can't wait to take it on our next trip.
by:
Randy
02/27/2026
I did receive the pin box right on time today and will be mounting it in next few days. I’ll let you know afterwards how it went, thanks for the follow up.
Randy
Randy
Mike L.
2/27/2026
Thanks Randy! Please let us know how the install goes....
by:
Randal
03/02/2024
I installed the unit today. It appears to be well built. You should note that it is very heavy compared to a Rhino Box (120# v 50#). I inserted the pin box onto my fifth wheel hitch and then backed into place to mount it on the camper making it a one person job.
Some items to note…hardware is not included. GenY recommends grade 8 bolts. The original hardware was grade 5 on the rhino box. Also, I don’t like to retension high strength bolts, so I would recomend new grade 8 bolts. The rhino only had 10 bolts where I could get 12 in this one. Also note that the tag on the actual pin box says only good for 18000lbs (not 21000 as advertised). The tongue rating was as advertised 3.5k model) My camper is smaller so the 18000 lbs isn’t an issue.
Haven’t actually road tested yet, but I am confident it will improve ride.
Some items to note…hardware is not included. GenY recommends grade 8 bolts. The original hardware was grade 5 on the rhino box. Also, I don’t like to retension high strength bolts, so I would recomend new grade 8 bolts. The rhino only had 10 bolts where I could get 12 in this one. Also note that the tag on the actual pin box says only good for 18000lbs (not 21000 as advertised). The tongue rating was as advertised 3.5k model) My camper is smaller so the 18000 lbs isn’t an issue.
Haven’t actually road tested yet, but I am confident it will improve ride.
by:
Ray
08/10/2023
The benefits of an airbag hitch without the worry of air leaks. Drastically improves the the ride and drivability.
Thanks Gen-Y and etrailer
Thanks Gen-Y and etrailer
by:
Rusty
06/05/2025
I have a GD Momentum 395m. The tongue weight can very depending on the cargo in the garage on the back end. With that said, after 5000 miles, we have a noticeable difference in the ride and bouncing with the Gen-Y hitch making it more comfortable on some of the highways that are rougher than others throughout the US.
Brooke M.
6/11/2025
Wow that's great, Rusty! Happy to hear that even after some use it's working the way it should - glad it's able to cushion some of the rough roads out there for you :)
by:
John
04/21/2026
Hitch installed faster than I thought it would. Fit was great.
by:
Robert
08/31/2022
Excelent king pin hitch, it takes 99% of the chucking out of the 5th wheel hitch.
by:
James
04/06/2024
Arrived as expected and had the installation completed in about two hours. My expert salesman saved me alot of misery because I had intended to order the wrong hitch and he corrected the error. Excellant service and really refreshing to work with people who really care.
by:
Doug J
09/30/2022
Super fast shipping. Easy install. Heavy buggar so hired two young ones to hold it while I bolted it into place. Coming up into the 1000 mile usage mark and it is doing its job well absorbing road shock. In New York state now. PA roads are awful bumpy so it got several good tests.
by:
Jeffery
06/12/2025
etrailer is the absolute best to order from! The only thing I worst is I should have ordered the gooseneck one instead of the fifth wheel to get more bed space
Brooke M.
6/16/2025
Why thank you for the kind words, Jeffery! I hear you about wanting the bed space. What kind of trailer are you pulling?
Brooke M.
6/19/2025
@JK Sweet! Those look SUPER nice. How long have you enjoyed the Coachman?
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Show More Reviews
See what our Experts say about this Gen-Y Hitch 5th Wheel Pin Box
- What Is The Difference Between The Pin Box GH-8071 And GY76PR?Hi Clif! The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 6.5K TW # GY76PR is the same thing as the GH-8071. We just changed the part number for our website as it was too similar to something else we carry and this was an easier way to differentiate the two. One thing to note though, the above Gen-Y pin box is rated for a pin weight range of 4,500 pounds to 6,500 pounds, so it may be a bit overrated (it looked like the typical hitch/pin weight of a 2022...
view full answer... - How Do I Choose Which Gen-Y Pin Box To Select For My Trailer?Hello again Steve. According to Gen-Y, you want to go off the actual GVWR when selecting your pin box. Since your GVWR is 15,495 you will definitely want to go with the 2,500 lbs - 4,500 lbs pin weight capacity range. The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY78GR you mentioned replaces the Lippert Rhino pin box. Please verify your trailer is currently equipped with the Lippert Rhino box. There should be a big sticker that says Rhino on it. Or if you can send me the model...
view full answer... - What Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box do I Need to Replace My MorRyde RPB72-FD?Hello Jeremy, I sent that number over to lippert and they were not able to find anything. Can you please send me a picture of the sticker if it is still on there? Should have a S/N number and and RPO number, I included a picture of what the stickers usually look like. I am trying to get the pin box number of your current one, so I can recommend the correct one for you.
view full answer... - Will Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box Work With Andersen 5th Wheel HitchHey Gary! The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY68GR will work with your Andersen hitch. However, I can't say for sure if you will still be able to jackknife your trailer. The Gen-Y Hitch Executive is roughly 2" shorter than the Lippert 1621 or 1621 HD pin box which means the clearance between your trailer and tow vehicle might be reduced. What kind of 5th wheel do you have?
view full answer... - Can I Replace a B&W Slider w/ a Curt Crosswing?Welcome back! Yes, you can so long as your truck has a set of industry standard rails. The Curt CrossWing Lightweight 5th Wheel Trailer Hitch item # C86JR is also compatible with the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box item # GY78GR you purchased.
view full answer... - What Gen-Y executive Pin Box Fits The 2017 Jayco Pinnacle 36FBT?Hello Tim. I can definitely point you in the right direction, but pin boxes are not custom fitted, so there is no way to look up your camper to know exactly what model of Gen-Y hitch you will need. The main thing we need to know is the pin box number or size of the current pin box. There should be a sticker on the pin box that shows the brand, model number, serial number and stuff. If you can tell me the brand, model number and serial number of your pin box, I can use this to determine...
view full answer... - Which Gen-Y Cushioned Pin Box for 41 ft Forest River 330BHHey Flint, you did your homework and I appreciate it! Yes the Gen-Y cushioned pin box part # GY78GR is correct for your Forest River 330BH. It fits in place of your Rhino Box pin box and would be the pin weight range you'd need as well. What type of fifth wheel hitch do you have?
view full answer... - Shock Kit And Gooseneck Pin Box For 2024 Brinkley Z3110 5th WheelHello Stephen. The Roadmaster Comfort Ride Leaf Spring Suspension Kit w/ Shocks # RM-2460-2580 will work great on your 2024 Brinkley Z3110 5th wheel since it has 3" diameter axles. The Comfort Ride kit will make huge improvements in ride quality and stability. A Gen-Y shock absorbing pin box will also help with ride quality since they use torsion rubber to absorb shock. The Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY78GR you were looking at is designed to replace the Lippert Rhino...
view full answer... - Will Additional Length of Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box Impact ClearanceHi Blake; the additional 3-3/4" will actually increase clearance since the trailer will sit a little further back. If it was shorter and brought it closer to the cab clearance would become a concern. The # GY43GR is the 5.5k tongue weight model so make sure your GVWR x 0.22 = 3,600-4,599 lbs. If you have a different calculation you will need a different model and can choose from the following: -Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 21,000 lbs - 3.5K TW # GY86GR...
view full answer... - Gen-Y Pin Box for 2024 Brinkley Model Z 3100 With Rhino BoxHey William! It looks like the GVWR of your 2024 Brinkley Model Z 3100 is 14,995 lbs. Are you looking for the standard king pin? If so, the correct pin box is the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY78GR. If you want the gooseneck pin box you need the Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box # GY33GR.
view full answer... - What are the Torque Specs for the Installation Bolt Kit for Gen-Y Hitch 5th Wheel Pin Boxes GY86FR?Hey Matt, welcome back! The Installation Bolt Kit for 5th Wheel Pin Boxes and 5th Wheel to Gooseneck Adapters item # GY86FR uses twelve 5/8" Grade 8 bolts that should be tightened to 160 ft-lbs. This kit is exactly what you need to install the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box item # GY78GR. What kind of trailer do you have? You can add this information, along with any other questions you have, where it says Add Comment.
view full answer... - What Gen-Y Pin Box Will Fit My Brinkley 3610 5th Wheel 18,000 lb GVWR?Hello Donnie, thanks for getting in touch. A Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box may work for your camper. Since your GVWR is 18K, you will want to go with the 4.5K model like # GY68GR. The GEN-Y 325-GH-8040 you mentioned is not rated quite high enough for your camper. This model is designed to replace the Lippert 1621 and 1621 HD pin boxes. There is no way for me to look up what pin box your camper is currently equipped with, so this is something you will need to confirm. There...
view full answer... - Option For Upgrading From Lippert Rhino Box Pin BoxHello Mike, thanks for reaching out. The Rhino Box actually uses its own unique bolt pattern, so you can use any pin box replacement that replaces the Rhino Box. We offer a few option for this, but what I recommend is the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY78GR. This is made specifically to replace the Lippert Rhino Box. It uses torsion rubber to absorb shock, a lot like the way torsion trailer axles work. The rubber flexes and reduces shucking and improves ride quality....
view full answer... - Gen-Y Hitch Shock Absorbing 5th Wheel Pin Boxes Compatible With Lippert Rhino Bolt PatternWe have the following Gen-Y shock absorbing 5th wheel pin boxes which are compatible with the Lippert Rhino pin box bolt pattern. The weights listed below are the maximum capacities the pin box is capable of supporting. 21,000 lbs - 3.5K TW # GY86GR 24K GTW - 4.5K TW # GY33GR 30,000 lbs - 4.5K TW # GY78GR 30,000 lbs - 5.5K TW # GY43GR We also have the following 5th wheel to gooseneck pin box replacements if you want to connect to a gooseneck ball rather than having to use the large 5th...
view full answer... - Replacement Gen-Y 5th Wheel Pin Box For A Lippert Rhino Bolt PatternThank you for all the info John, Based on the numbers you provided your pin box has a Rhino bolt pattern with a 21,000 capacity. To find the correct Gen-Y pin box we'll need to check your trailer's pin weight. If the pin weight ranges from 1,600lbs - 2,599lbs then you'll need part # GY86GR. If your pin weight ranges from 2,600lbs - 3,599lbs then you'll need the # GY78GR. If your new Silverado has a short bed as well then you may need to swap out the base on your Curt A25 with a sliding...
view full answer... - Determining Pin Weight And Compatbility Of A Gen-Y 5th Wheel Pin Box On A Toy Hauler Trailer The formula you used is only a guess and wouldn't be an accurate way to determine your trailer's actual pin weight since it's a triple axle toy hauler. The only way to get an accurate number would be to measure at highway weigh station. You'll hook up to the trailer and drive onto the scale with only the 4 wheels of the truck sitting on the scale. You can then unhook from the trailer and measure the weight of the truck. You'll subtract the truck's weight from the weight while connected...
view full answer... - Distance From Front Bolt Hole to King Pin of Gen-Y Hitch 5th Wheel Pin Box For Lippert Rhino 4.5kI reached out to Gen-Y to confirm, and what they told me was the distance from the front bolt hole to the king pin was 13.5 inches for the pin box that replaces the Lippert Rhino, which is the following part number: - Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 4.5K TW # GY78GR
view full answer... - Is The GY78GR The Same As The GH8051 Pin BoxYes, the # GY78GR and the GH-8051 are one and the same. We use our own unique part numbers for a lot of parts. So # GY78GR is just our unique part numbers for the Gen-Y GH-8051.
view full answer... - Recommended Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box to Replace a Rhino Box?Hey Chuck, welcome back! From the center of the kingpin to the center of the front mounting bolt is 13.634" on the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box item # GY78GR. This pin box is going to replace a Lippert or Curt Rhino pin box only. It has a 30,000 lbs towing capacity and a pin weight capacity range of 2,500 lbs - 4,500 lbs. What kind of 5th wheel trailer do you have and do you currently have a Rhino pin box installed on it? You can add this information, along with any...
view full answer... - Which Gen Y Cushioned Pin Box Adapter if Right at Top of Weight RangeHey Flint, I would probably lean towards going with the heavier duty part # GY78GR as most likely you are underestimating your pin weight but if it was me I would probably find a weigh station and get the exact pin weight to make the best call. If you take your trailer to a weigh station they will be able to help you determine exact pin weight but basically you'd want to get the weight on the rear axle of the truck with and without the trailer connected. Let me know what you find.
view full answer... - Gen-Y Pin Box to Replace the Gen-Y Executive Torsion-Flex GH-805-BRK-BK on a 2026 Brinkley Z3200Hey Dustin, thanks for reaching out! The part number GH-805-BRK-BK that Brinkley provided tells us your 2026 Brinkley Z3200 is currently equipped with the Gen-Y Executive Gooseneck Pin Box. If you'd like to switch back to a traditional fifth-wheel setup, you can replace it with the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box # GY78GR. Both pin boxes use the Lippert Rhino mounting pattern, so the # GY78GR is a direct bolt-on replacement for your current GH-805-BRK-BK. It also features...
view full answer...
Do you have a question about this 5th Wheel Pin Box?
Info for this part was:
Written by:
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Updated by:
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Updated by:
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Updated by:
Michael B
Video Edited:
Dustin K
Video Edited:
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Installed by:
Steven C
Test Fit:
Kevin C
At etrailer 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.
Mike L.
10/28/2025
Hi Michael. This particular pin box is designed for 5th wheels with a pin weight between 2,500 lbs - 4,500 lbs. What's the pin weight of your rig (GVWR X .22)?