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Replacement MORryde Cushioned Pin Box For a 2021 Grand Design Reflection 320MKS 5th Wheel Camper

Question:

Which Moryde pin box should I purchase to reduce my chucking for 2021 Grand Design 320MKS? TV is 2016 F250 Platinum w/ 6.7 diesel.

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Expert Reply:

For your 2021 Grand Design Reflection 320MKS it appears that you currently have a 1621 Pin Box # LC1191191. You can verify this by checking the bolt hole dimensions on your Reflection. The horizontal bolt holes will be spaced 7-7/8" apart on center and the vertical bolt holes are spaced 2" on center. I have included an image with these dimensions.

The MORryde Cushioned 5th Wheel Pin Box # MR74VR will be the correct pin box for your Reflection. This pin box is designed to be used with trailers with a GVWR between 11,500lbs and 14,000lbs. Your reflection has a GVWR of 13,995lbs so it fits into that weight rating. This pin box allows for up to 3" of cushioned travel front to back and 1-1/2" of travel left to right.

They do offer a MORryde Pin Box Adapter # MR57ZR if you have a a short bed and are using a PullRite SuperGlide hitch.

Lippert 1621 Pin Box Dimensions
Lippert 1621 Pin Box Dimensions
(click to enlarge)
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Gregory M

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