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How To Determine The Correct Reese Goosebox For a 2012 Keystone Alpine  

Question:

This is the only sticker I have on my pin box.

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Expert Reply:

To find if the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94720 will work on your 2012 Keystone Alpine 3555RL you will need to check your current pin box for a sticker that identifies what model it is. The Reese Goose Box # RP85FR is made to replace Lippert 1621, 1621HD, and 0719 pin boxes.

If the sticker is missing from your pin box I included an article that will show you how to measure your pin box to find out which model it is.

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Samuel C
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Marty B.

11/12/2020

This is the only sticker I have on my pin box.

Samuel C.

11/12/2020

Thank you for the picture! I contacted Lippert and confirmed that you have a 1621 pin box. You can use the Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP85FR you mentioned to replace your Lipper 1621. From my research your 2012 Keystone Alpine has a GVWR of 15500lbs so this 20k pin box would be more than enough.

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