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Determining Which Reese Goose Box Fits Trailer With Lippert 1621 Pin Box


We just bought a new fifth wheel and the pin box numbers don’t match up with the numbers you show. I have a Lippert pin box and below is the info on the sticker. Please let me know what Goosebox I’ll need. Thanks! S/N: S004630365 RPO - 0004050373 LCI Item Number: 759327 Chassis MFG Date: 03/07/20


Expert Reply:

I reached out to my contact at Lippert and based on the information you provided your trailer uses the Lippert 1621 Pin Box with a 15500lb weight rating.

The correct Reese Goose Box to use as a replacement is the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 - 16,000 lbs # RP94716 which is a direct replacement for your pin box, and has a slightly higher 16000lb rating.

You could also use the # RP94720 you were looking at as it also replaces the 1621 pin box, but it has a 20000lb weight capacity which is more than you need and is a bit more expensive.

I included videos for both of the products mentioned for you to take a look at.

expert reply by:
Samuel C

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