Correct Reese Goose Box for a Lippert 1621 Pin Box
Updated 10/22/2025 | Published 04/07/2025
Products Featured in This Question
Question:
I have a Lippert LCI item 1985441 S/N 019-000174670 fifth wheel pin box, I want to change it to a goose neck set up. What do you recommend.
asked by: Bryce E
Expert Reply:
Hey Bryce (great name by the way), I spoke with Lippert and they said that this is a 1621 pin box, meaning the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP85FR you're looking at will be the correct pin box.
This pin box has a 20,000 lb capacity, has a simple bolt on install, and will work with a 2 5/16" ball. You're also going to need the BulletProof Hitches 3/8" Safety Chains with Clevis Hooks # BPH86RR.
If I can help with anything else, please feel free to drop a comment and let me know!
Continue Researching
- Search Results: 5th wheel gooseneck adapter
- Q&A: Recommended Shocker Gooseneck 5th Wheel Hitch for a Lippert 1621HD Pin Box
- Shop: Gen-Y Hitch Nomad 5th Wheel to Gooseneck Pin Box - 1621,1116, 1716 - 30K GTW - 6.5K TW
- Shop: MORryde GooseTech 5th Wheel to Gooseneck Pin Box for 14K to 18K Trailers w/ Lippert 1621
- Shop: Fifth Wheel Hitch
- Shop: Safety Chain with 2 Hooks for Gen-Y 5th Wheel to Gooseneck Pin Box - 84" Long - 26,000 lbs
- Shop: Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box - Lippert 1621/1621HD - 30K GTW - 4.5K TW
- Shop: Gooseneck Hitch
- Q&A: How to Remove the Ranch Hitch Adapter From a 5th Wheel Trailer King Pin
- Q&A: Recommended Clearance Dimensions Between Truck Bed Rails and 5th Wheel Trailer
- Q&A: Is Offset Ranch Hitch 5th-Wheel-to-Gooseneck Coupler Adapter Needed For Short Bed Truck
- Video: Andersen Gooseneck and Fifth Wheel Adapters - Adapts Trailer - AM3139 Review
- Video: Let’s Check Out the Slide Hammer for Ranch Hitch 5th-Wheel-to-Gooseneck Coupler Adapter
- Video: Checking Out the Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter w/ Offset
- Shop: Slide Hammer for Ranch Hitch 5th-Wheel-to-Gooseneck Coupler Adapter
- Shop: Shocker Hitch 5th Wheel to Gooseneck Coupler Kit w/ Demco eZ-Latch for Lippert and Fabex Box - 24K
- Shop: Shocker Hitch 5th Wheel to Gooseneck Coupler Kit w/ Demco eZ-Latch for Lippert Turning Point - 24K
- Search Results: pin box
- Search Results: 66n4ab96gm
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Search Results: demco capture plate
- Search Results: fifth wheel hitch
- Search Results: trailer safety chains
- Q&A: Replacement Gooseneck Pin box for a Lippert Turning Point
- Q&A: Recommended Goose Box to Replace a Lippert Turning Point Pin Box
- Search Results: gooseneck pin box
- Q&A: Recommended Pin Box Upgrade for a Lippert 1621 15,500 lbs Capacity Pin Box
- Video: How to Install the Curt A25 5th Wheel Trailer Hitch for Ram Towing Prep Package on a 2021 Ram 3500
- Video: B and W Underbed Gooseneck Trailer Hitch Ball and Safety Chain Kit Install - 2021 Ram 3500
- Video: Review of CURT 5th Wheel Hitch - Fifth Wheel - C64BR
Jon G.
10/22/2025
Hey Bryce, how did the swap to the Reese Goose Box go on your fifth wheel? I'm curious if the fit and ride quality met your expectations. Your update could make it easier for others looking to move from a pin box to a gooseneck setup.