Easy Way to Tell Difference Between Lippert 1621 and 1716 Pin Boxes  

The difference between the 1621 and the 1621SHD is weight capacity and how many bolts is required to mount it. The 1621 uses 4 bolts for mounting. The 1621SHD requires all 6 bolts to be used.

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…

The Grand Design Solitude 310GK uses a Lippert 1621 pin box so the correct Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter is part #RP85FR. If you wanted to confirm, you'd simply look for the model number which will usually be…

Thank you so much for the photos! They were super helpful, and I can verify for you that the correct touch screen panel for your Lippert 6-point leveling system is the part number you asked about: - Replacement Touch Screen Control Panel #LC83VR This…

Most standard pin boxes will not make a 90 degree turn in anything less than an 8 foot truck bed, but that is due to being too close to the cab - not the rails. You mentioned you wanted to replace the Rota-Flex with the Gen-Y hitch. Your old pin box…

Manufacturer's love to make it hard for anyone to swap out their pin box so we would need to see the tag for the pin box, which would have a serial number as well as the RPO number in order to determine the bolt pattern. This tag can typically be…

The difference in tire diameter will be an additional 2-1/2 inches going from the 225/75-15 which measure 28.4 to the 235/80-16 which measure 30.9 inches. As a general rule of thumb the minimum safe distance between front and rear tires on the same…

I checked with Dexter, manufacturer of many trailer parts, and according to them there should be at least 1 inch of space between the tires when under load. So once your trailer is loaded and ready to tow, if you have more than 1 inch of space…

We have the Goose Box and spacer kit together in one part number, #RP94716-61301. Using the spacer kit the Goose Box will fit Lippert 0115, 1116 and 1716 pin boxes. I have linked the installation details for you. The spacer kit by itself is…

There should be a sticker or plate on the pin box itself that lists the manufacturer and model of the pin box. If it is not present then there are some measurements you can take to determine the model of the pin box. I have included a link that…

Your Grand Design Solitude 384GK-R will have a Lippert 1621 pin box, so you'll need the following part number: - Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Pin Box #GY58GR I do recommend verifying you have the 1621 pin box, and you can…

Thank you for all of the information and the photo! For your application the best fit is going to be the 25K Gen-Y Hitch Shock Absorbing 5th Wheel - Gooseneck Pin Box #GY38FR since you have the 1621HD pin box model. Just a few things to note when it…