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…

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90…

Hey Jay. It sounds like you are on the right track here because a sidewinder pin box will be your only option for pulling your 5th wheel since you have a short bed truck with the Rambox. That said, you are right that the Reese Sidewinder cannot be…

Because it's lighter, less expensive, has fewer moving parts and is mechanically less complicated…

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…

The correct MORryde Cushioned 5th Wheel Pin Box for a Grand Design Reflections 337RLS is part #MR84VR. This pin box will do a wonderful job of helping smooth the ride due to the internal cushioning which reduces road shock.

We have the following Gen-Y shock absorbing 5th wheel pin boxes which are compatible with the Lippert Rhino pin box bolt pattern. The weights listed below are the maximum capacities the pin box is capable of supporting. 21,000 lbs - 3.5K TW #GY86GR…

So for your set up, a 2021 Ram 2500 short bed with the RamBoxes, you will need to use a Sidewinder in order to have the clearance to tow a 5th wheel. The Goose Box…

The new Rhino Box from Lippert currently has no replacements so you won't be able to swap out this pin box with a Sidewinder to add more turning clearance.…

No, it does not but I have one that does. It is the Gen-Y Hitch Shock Absorbing 5th Wheel Pin Box item #GY86GR. This pin box is custom designed for the Lippert Rhino bolt pattern. It has an identical 21,000 lbs towing capacity and a 3,500 lbs…

To best combat chucking, between a MORryde and Rota-Flex pin box, the best option to replace your Lippert 1621 is the Rota-Flex, with the correct part number being the following: - Trailair Rota-Flex 5th Wheel Pin Box #LC328330 While no pin box is…

When adjusting the height of a pin box such as #LC1191191 it is important to support the pin box when removing the bolts. I recommend 2 or 3 buddies to give you a hand and make sure no one is beneath the pin box while raising or lowering it. With…