How to Find Gen-Y Gooseneck Pin Box Adapter for a 2021 Grand Design Reflection 31MB

Updated 04/11/2024 | Published 04/10/2024

Question:

Which Gen-y Gooseneck will I need for a 2021 Grand Design Reflection 31MB

asked by: Brad

Expert Reply:

Hey Brad, thanks for reaching out!

What pin box number do you currently have installed on your 2021 Grand Design Reflection 31MB? You should find a sticker with a number like "1621" or even a serial number and the brand would work.

Not all 5th wheel trailers come with the same pin box but once I have the info listed above I'll be able to help you find the correct Gen-Y gooseneck coupler.

For example, the Gen-Y Hitch 5th Wheel to Gooseneck Pin Box # GY38FR will replace a 1621 or 1621HD pin box and is in the weight range of your 5th wheel.

expert reply by: Jon G

Brad

4/10/2024

LCI Item Number: 736457 RPO 0004337212 Max GVWR 15500 Max PIN Weight 3100

Brad

4/11/2024

S/N S004896731 LCI 736457 RPO 0004337212 Max GVWR 15500 Max Pin WT 3100

Jon G.

4/11/2024

@Brad Thanks for the extra info! I was able to confirm with my contact at Lippert that this is a 1621 pin box so the part # GY38FR I referenced above will indeed be the part you need to replace your current pin box.