Recommended 5th Wheel To Gooseneck Pin Box For A 2021 Grand Design Solitude

Question:

I have a 2021 grand design solitude 310gkr rv with a moryde king pin with a GVRW of 15400 and needing to know if the GY58GR Gen Y goose neck is what I need

asked by: Billy H

Expert Reply:

The key to determining the correct replacement pin box for your 2021 Grand Design Solitude 310GKR is to figure out what the bolt pattern is. There will typically be a sticker somewhere on the pin box either indicating the bolt pattern or will have serial numbers that we can use to determine the bolt pattern.

The Gen-Y Hitch 5th Wheel to Gooseneck Pin Box # GY58GR you referenced has a 1621 bolt pattern, which is the most common pattern on the market. Most likely this will be a fit but you'll definitely want to ensure that it is prior to purchase. This pin box is also a bit overkill for a 15,400lb GVWR as well, so you would most likely end up with a much stiffer ride quality than you would want. I recommend going with the lower 18k # GY56FR to help with ride quality.

Let me know what the bolt pattern is or those serial numbers so I can confirm fitment.

expert reply by: Kevin C