Can I Use A 1621 Pin Box On A Camper With "Wings" That Are 12-1/2" Wide?

Products Featured in This Question

Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - Lippert 1716 - 16,000 lbs

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$1725.82

1/4" Filler Shims for Gen-Y Hitch Executive Fifth Wheel Pin Boxes

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$49.97

Spacer Kit for Rotating Turret for 5th Airborne and Sidewinder 5th Wheel King Pins

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$55.23

Question:

Well looking for some help I reached out to lippert to ask what frame I had they told me the 1621 so I ordered the 94716 goose box. It came and to my surprise there was a half inch gap left. I ordered the shims 61301and the bolt hole pattern no where near close. Since I can’t get help from lippert and they say I have the 1621 frame what do you guys think I have attached a photo did I get the wrong goose box?

asked by: Nicholas Y

pin box wings
(click to enlarge)

Expert Reply:

Hello Nicholas. I also reached out to my contact at Lippert to double check and they did confirm that that it should be a 1621 pin box. The problem is all of the 1621 pin boxes are 12" wide. I have never heard of a 12-1/2" wide 1621 pin box, but here we are. I have two potential solutions for you, both involving a spacer kit.

First, can you first try using the # RP61301 spacer kit that you already have, and only use 4 bolts instead of the original 5? I included the picture below with an example. Using 4 bolts for this pin box is completely acceptable/safe. If I am not mistaken, the bolt holes on the # RP61301 should line up to allow this.

If I am wrong and they still do not line up, you could instead use the Gen-Y 1/4" Filler Shims # GY76FR. These will also work for this purpose and will allow all 5 of the original bolts. Again, using only 4 bolts is also acceptable. Feel free to reach out if you have additional questions.

expert reply by: Jesse M

Nicholas Y.

4/11/2024

So I looked again and remeasured. In top of the wings I’m at 12 1/6 inch and bottom is at 12. These are the inner measurements outer is 12.5. So I think I got confused from inner to outer. I measured the goose box and on top near the front where the goose box goes down to ball I’m 11. 7/8 but on the back of the plates I’m 11 and a half inches that’s why I thought I needed spacers. Is it going to be an issue to use the bolts to pull the goose box out to meet the wings of the pin box. I will be pulling the goose box/wings in or out about 1/8 of an inch on both sides

Jesse M.

4/11/2024

@NicholasY Oh ok thanks for clarifying. That make a lot more sense because if a 12-1/2" wide 1621 pin box was a thing surely we would have heard of it. So to answer your question, it is fine if you use the bolts to "pull" everything together. You may find that the wings on the camper will come in a bit before the pin box wings will move. The wings on the camper should be right at 12" anyway. I wonder if they were bent slightly when the old pin box was removed? Whatever the case, the # RP94716 goosebox will be correct for you. Everything should work out when you bolt it all together.