Recommended Reese Goose Box for a 2011 Montana 3400RL
Question:
Recently purchased this RV and need to know if I will need the adapter plates for the mounting.
asked by: Chris
Expert Reply:
Installing the Reese Goose Box # RP85FR will depend on the pin box number of your current king pin as this is specific to the Lippert 1621 and 0719 models. If you are unsure of your pin box, however, it is definitely a good idea to verify which you have. This can be easily done by contacting the manufacturer of your trailer to ask. All you will need is the VIN and they should be able to tell you as they keep this on file.
In the off chance they cannot tell you, there are other ways to verify which one you have. First will be to check your pin box for a label. The manufacturer and model number of the pin box is usually printed on a sticker or stamped into a plate or directly into the metal of the pin box.
If the label has been removed and no stamping can be found, you can also measure to confirm you pin box number. I have an article attached that will show exactly where to measure and what that measurement will determine.

Product Page this Question was Asked From
Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter - 20,000 lbs
- 5th Wheel Gooseneck Adapter
- Adapts Trailer
- 5th Wheel Trailer to Gooseneck Hitch
- No Extra Clearance
- 20000 lbs GTW
- Replaces Pin Box
- Shock Absorbing
- Fabex 600
- Lippert 0719
- Lippert 1621
- Lippert 1716
- Lippert Rhino
- Reese
more information >
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