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Will Reese Goosebox fit 2014 Grand Design Momentum 355TH

Question:

Will the Reese Goosebox fit my 2014 Grand Design Momentum 355th? I cant find a pin box number.

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Expert Reply:

In order to find if the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1621 and 0719 - 20,000 lbs # RP94720 fits your 2014 Grand Design Momentum 355TH you will need to identify your current pin box. Since it sounds like there is nothing on your pin box to identify it there are two options.

The first is to find the VIN and contact the manufacturer so that they can cross-reference what your pin box number is. If they don't have this information then the only other way to find out is to measure your bolt pattern. See the attached article which explains how to measure and identify your pin box.

Assuming your bolt pattern matches the Lippert 1621, 1621HD, or 0719 pin box you will be able to use the # RP94720. The Lippert 1716 will also work but you would need the spacer kit # RP61301. If you have a different bolt pattern you may need a different Reese Goosebox or Gen-Y for a replacement.

I have attached a link to all of our 5th wheel to gooseneck pin boxes for your reference.

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Robin H

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