Replacement Gooseneck Pin Box for a 1716 Pin Box

Updated 04/21/2025 | Published 04/16/2025

Question:

I have a lippert pin box for my fifth wheel that I want to upgrade to a gooseneck. RPO-0003991857 5LZBF3320MR019335 What will work for this current pin box?

asked by: Matt

Expert Reply:

Hey Matt! I need you to get me the LCI number and the date of manufacturing off of the sticker where you found the RPO number. If you could comment below with this information I can identify your bolt pattern and find you the correct gooseneck pin box.

expert reply by: Jerred H

Matt

4/21/2025

Jerred, Thanks for reaching out. That information is LCI Item Number: 7625611 Chassis MFG Date: 03/13/20. Regards.

Jerred H.

4/21/2025

@Matt You're welcome! Thanks for getting back to me so quickly! I checked with Lippert and your 5th wheel trailer has a 1716 bolt pattern. The correct gooseneck pin box for your trailer is going to be the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter item # RP85FR. You will also need the Reese Safety Chain Kit with Clevis Hooks - 44" Long - 20,000 lbs item # RP49151. These are required by law and are not included with the goosebox. What kind of 5th wheel trailer do you have?

Matt

4/21/2025

@JerredH Eclipse Iconic Widelite 3322CK toyhauler.

Jerred H.

4/21/2025

@Matt That's a nice set up! The Reese Goose Box item # RP85FR has a 20,000 lbs capacity so it's definitely going to get the job done. If you have any additional questions feel free to throw them into the comment box below and I'll be happy to answer them.