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Review of Reese Fifth Wheel King Pin - Pin Box Upgrade - RP94720

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Reese Fifth Wheel King Pin - Pin Box Upgrade - RP94720 Review

Today we're gonna take a look at the Reese Goose Box 5th-wheel to gooseneck air ride coupler adapter for the Lippert 1621 and the Lippert 0719 pin boxes. Has a 20000 pound weight capacity. Now this air ride coupler will let you tow your 5th-wheel trailer with your gooseneck hitch.This Goose Box will replace the standard pin box that's on your 5th-wheel trailer, and this part is endorsed by Lippert components, so it will not affect the warranty on their trailer frame.This uses a fully enclosed airbag on the inside, and then right down here they have dual shock absorbers. They'll both provide cushion and absorb your road shock, helps improve handling an overall ride. This will decrease both your vertical shock, which is the bounce up and down, and the longitudinal shock which is your chucking back and forth.This does limit the strain on your truck and trailer frames, the airbag on the inside can be adjusted to give you just the right amount of support. Right here, this opening, this is your air inflation indicator, and when this shows all black like it is now, that means it has low air pressure.Now, you put your air in your airbag right back here where the air valve is.

So if you put more air in there if it shows mostly white, that means that's maximum air pressure. Probably don't want to run it that high.Now if you do look in here and it shows you half white and half black, then that's probably your nominal air pressure you want to run in this.Does use this integrated pivot tube right here. This is used to help minimize jarring by allowing four and half movement. On the very back of the pivot tube, they insert a grease zerk fitting. Allows you to put a grease gun on there and pump grease into the pivot tube right on the coupler shaft.

So it helps give you lubrication on your connection.Now when you go to hitch up this Goose Box, you want to make sure the coupler handle, which is this portion right here, this is in the locked position, like it is showing right here, locked position. And you'll just lower this coupler onto your gooseneck ball. Once it lowers on, this handle will open, and then snap shut in the lock position. That means you're hooked up all ready to tow.To unhitch this Goose Box, you'll just pull this handle back using this cable right here. You just pull the cable handle back, hook the cable into this cable stop right up here, and the handle should be in the unlocked position which is right here.

Now if you do need to adjust this cable stop to make sure it shows in the unlocked position, you can do that.And then once it's in the unlocked position, you just raise that trailer off the goose ball, release this cable, and it should go back into the lock position, you're ready to hook up again.Now when this is hitched up, or when the trailer's in storage, a lock can be used for theft prevention in this lock location right here. If you noticed here, the holes line up. You can put a padlock right through there.This does have a sturdy . Or it's made of a sturdy powder coat finish on this steel construction for corrosion resistance. It has a simple bolt on installation.

The mounting hardware right here is all included.A few specs on this. It is designed to replace the Lippert 1621 model. Lippert 1621HD, and the Lippert 0719 pin boxes. One note is this will work on a Lippert 1716 pin box, but it does require a spacer kit for it to work. We do sell that separately on our website. It's part number RP61301. And it is listed on this product page as a related product.Towing capacity on this is 20000 pounds. Ton weight capacity is 4000 pounds. And this is designed to fit on the standard gooseneck diameter ball size of two and 5/16 of an inch.But that should do it for the review on the Reese Goose Box 5th-wheel to gooseneck air ride coupler adapter for the Lippert 1621 and Lippert 0719 pin boxes. And this has a 20000 pound weight capacity.

Nicholas F.


will this hitch fit my fifth wheel trailer? my Lippert hitch Lcl item number 721604 and serial # is s002401369 and RPO-0001698122 please advise thank you

Etrailer Expert

Jon G.


According to Lippert you have a 1621 pin box which means that this Reese Goose Box # RP94720 will fit your 5th wheel trailer perfectly.

Dan B.


How long is the neck? Is it longer then a standard kippers 1621 asking cause I have a short bed flat bed with a recessed gooseneck ball