Correct MORryde Cushioned Pin Box for 2016 Jayco 321RSTS

Updated 11/12/2025 | Published 11/07/2025

Question:

Hi, I’m looking to replace my factory pin box with a MoRyde unit, I have a 2016 jayco 321 RSTS I’ve added a photo of my current box with parts numbers Can you please recommend which model with work. Thank you

asked by: Jeff D

Pin Box Sticker
(click to enlarge)

Expert Reply:

Hey Jeff! Thanks for providing the picture to help me identify your pin box. It isn't often they aren't sure, but according to Lippert it could be a 1621, an unspecified MORryde, or a Reese Revolution. If it doesn't rotate we know it isn't the Revolution and I think we can rule out the MORryde as well. The 1621 will be 12" wide (G in the picture below) and have two rows of bolts if you want to double check.

It looks like the GVWR on your 2016 Jayco 321RSTS is 12,500 lbs so assuming it is the 1621 you need the MORryde Cushioned 5th Wheel Pin Box for 11.5K to 14K Trailers w/ Lippert 1621 and 1621HD # MR74VR.

expert reply by: Robin H

Bolt Pattern
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Jeff D.

11/11/2025

Hi Robin, thank you for the quick response and you are correct its not the revolution the pic you provided is exactly what I have on the unit. great info and know I know which one to order... Happy Trails JD