Recommended Gooseneck Pin Box To Replace Lippert 1621 On 5th Wheel Trailer
Question:
Which gooseneck pin box will fit my trailer? I included a picture of the serial number on the current pin box.
asked by: Brandon O
Expert Reply:
Thank you for the picture!
I reached out to my contact at Lippert and based on the serial number you provided I was able to confirm that your trailer has a 1621 pin box with an 18000lb rating.
For a gooseneck pin box that will fit you will need either the Reese Goose Box - 20000lb # RP85FR or the Gen-Y 25000lb # GY38FR.
Between these two options I recommend the Gen-Y # GY38FR due to it having a built in shock absorber feature that will give you a smoother ride, but also due to it having an auto latch coupler that allows for an easy hook up.
I included videos for both of the products mentioned for you to take a look at.

Products Referenced in This Question
Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box - Lippert 1621/1621HD - 25K GTW - 4.5K TW
- Gooseneck and Fifth Wheel Adapters
- Adapts Trailer
- Fifth Wheel Trailer to Gooseneck Hitch
- Replaces King Pin
- King Pin Adapters
- Lippert 1621
- Lippert 1621HD
- Gen-Y Hitch
more information >
Product Page this Question was Asked From
Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - 20,000 lbs
- Gooseneck and Fifth Wheel Adapters
- Adapts Trailer
- Fifth Wheel Trailer to Gooseneck Hitch
- 20000 lbs GTW
- Replaces King Pin
- King Pin Adapters
- Fabex 600
- Lippert 0719
- Lippert 1621
- Lippert 1716
- Lippert Rhino
- Reese
more information >
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