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  1. 5th Wheel Pin Box
  2. Gen-Y Hitch
  3. Lippert Rhino
  4. Upgraded Pin Box
  5. Absorbs Road Shock and Reduces Chucking
  6. 30000 lbs GTW
Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 4.5K TW
Gen-Y Hitch

Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 4.5K TW

Part Number: GY78GR
$1,179.97
Retail:$1,643.46
You Save: $463.49
5th Wheel Pin Box
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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. 1-800-940-8924 to order Gen-Y Hitch 5th wheel pin box part number GY78GR or order online at etrailer.com. Free expert support on all Gen-Y Hitch products. Great prices and Fastest Shipping for Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 4.5K TW. 5th Wheel Pin Box reviews from real customers.
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  • Reviews (66)
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Gen-Y Hitch 5th Wheel Pin Box - GY78GR

  • Lippert Rhino
  • Upgraded Pin Box
  • Absorbs Road Shock and Reduces Chucking
  • Gen-Y Hitch
  • 30000 lbs GTW

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
  • 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

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. 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.


torsion diagram

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






Customer Reviews

Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box - Lippert Rhino - 30,000 lbs - 4.5K TW - GY78GR

Average Customer Rating:  4.7 out of 5 stars   (66 Customer Reviews)

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.

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See what our Experts say about this Gen-Y Hitch 5th Wheel Pin Box

  • Will Additional Length of Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box Impact Clearance
    Hi 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 Hitch Shock Absorbing 5th Wheel Pin Boxes Compatible With Lippert Rhino Bolt Pattern
    We 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 Pattern
    Thank 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...
  • Is The GY78GR The Same As The GH8051 Pin Box
    Yes, 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...
  • Distance From Front Bolt Hole to King Pin of Gen-Y Hitch 5th Wheel Pin Box For Lippert Rhino 4.5k
    I 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 16.559 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...
  • 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...
  • 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 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...

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Info for this part was:

Employee Lindsey S
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Employee Kathleen M
Updated by:
Kathleen M
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