1. Towing
2. 5th Wheel Gooseneck Adapter
3. Connects to Gooseneck Holex

I spoke with my contact at Trailair and from your serial number we were able to determine that your trailer came with a 1621 HD pin box which is a long pin box style. I was unable to obtain the exact part number for your Trailair pin box but from…

Hey Mark, Nope, your long bed GMC Sierra 3500 won't require the use of an offset gooseneck hitch ball with the Gen-Y Hitch 5th Wheel to Gooseneck Pin Box #GY58GR. With the gooseneck prep package you can use a…

Hi James, To my knowledge the Reese Goosebox is the only replacement option that won't void the frame warranty. That being said, the frame warranty is typically only a year so you really…

Hey Michael, the Grand Design Reflection 100 series 27BH that you are interested in has a Lippert 1621 style pin box so the Goose Box you would want is the part #RP94716 which was designed to fit it. The part #RP94716-61301 is same Goose Box but it…

Hey John, The Gen-Y Hitch 5th Wheel to Gooseneck Pin Box #GY98GR has a matching bolt pattern to your Rhino Box pin box. You will want to check your 5th wheel's pin weight to ensure the 3.5K model is going to be the…

Hey Terry, from previous customers we have determined that your 2022 Alliance Valor 40V13 has a Lippert 1621 pin box on it so the correct Gen-Y gooseneck adapter would be the part #GY66FR that you referenced which has a 30k trailer capacity and a…

A gooseneck adapter cannot be used with the Trailair Rota-Flex 5th Wheel Pin Box - Lippert 1621 - 21,000 lbs #LC328329 because of the excess play and movement that would be present at the connection point. You would instead need to swap out your…

Hey Brian, The distance is 12 inches between the arms of the Shocker 5th Wheel to Gooseneck Pinbox for Lippert 1621/0719 and Rhino Box #SHK23MR. This replaces the 12 inch wide Lippert 1621, 0719 and Rhino Box pin boxes on a 5th wheel trailer, so…

Thanks for the picture! That is exactly what I need to confirm what pin box your Forest River Shasta Phoenix 28RB has. I just spoke with my rep at Lippert and you have a 1621 pin box with an 18,000 lbs capacity. You will want the Gen-Y Hitch 5th…

In regards to a Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter like part #RP94720 and a Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Adapter Pin Box like part #325-GH-8045, the main difference is that one uses air for…

Thanks for the pictures and congrats on the new trailer! You are correct the Gen-Y item #GY98GR would be the correct adapter for your Jayco Eagle. This system replaces the Lippert Rhino pin box and has the extra pin weight capacity you will need. I…

The B&W Companion Gooseneck-to-5th-Wheel Trailer Hitch Adapter part #BWRVK3500 that you referenced has a vertical adjustment from 16-1/4" - 18-1/4".…