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Old 01-16-2016, 09:05 PM   #1
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Pin Box on Sierra 377FLIX

Hello. Does anyone know what the make and model of pin box is, on a 2016 Sierra 377FLIX? I am in the process of buying one, and am thinking of upgrading. to an Air Ride. Thanks

K
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Old 01-17-2016, 12:19 PM   #2
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Go to the MOR/ryde website and download the Pin Box Identification Guide (2 pages). After completing the measurements on page 2, look on page 1 to match your numbers to the "Replaces OEM" column.

Now you know what frame you have and you can decide which pin box upgrade is right for you. In my case I found a TrailAir at eTrailer.com. Super fast and free shipping.

If you need additional mounting bolts go to Tractor Supply and use at least grade 5 bolts with washers on both sides of the frame.
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Old 01-17-2016, 02:33 PM   #3
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Originally Posted by SilhouettePenny View Post
Go to the MOR/ryde website and download the Pin Box Identification Guide (2 pages). After completing the measurements on page 2, look on page 1 to match your numbers to the "Replaces OEM" column.

Now you know what frame you have and you can decide which pin box upgrade is right for you. In my case I found a TrailAir at eTrailer.com. Super fast and free shipping.

If you need additional mounting bolts go to Tractor Supply and use at least grade 5 bolts with washers on both sides of the frame.

That's the problem. I don't physically have the camper yet. Its on order, and wont be ready to pick up for another 6- weeks. I was wanting to get the Air Ride beforehand. Does anyone know what the measurements are for the 377FLIK??
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Old 01-18-2016, 01:30 AM   #4
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Should be a standard 1621 pin box, that's what mine was on my 365saq, the lo5 trail air replaces it


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Old 01-18-2016, 01:35 AM   #5
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Click image for larger version

Name:	ImageUploadedByForest River Forums1453098925.758370.jpg
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ID:	97984there are the dimensions for a 1621 pin box


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Old 01-18-2016, 01:06 PM   #6
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Thanks jerky. That's kind of what I was thinking, too. It seems to be fairly common. Another member with a 377FLIK also referenced to it in another thread. I appreciate your reply.
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Old 01-18-2016, 01:37 PM   #7
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I would use grade 8 bolts.
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Old 01-18-2016, 02:11 PM   #8
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Grade 8 it is... Thank you


377FLIK
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Old 01-18-2016, 03:03 PM   #9
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Quote:
Originally Posted by kasedian View Post
Hello. Does anyone know what the make and model of pin box is, on a 2016 Sierra 377FLIX? I am in the process of buying one, and am thinking of upgrading. to an Air Ride. Thanks

K
My Sierra has a Trail-Air Rota-flex but most dealers (except mine) just have the no flex one on makes for a rough ride
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Old 01-18-2016, 03:08 PM   #10
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That's the problem. I don't physically have the camper yet. Its on order, and wont be ready to pick up for another 6- weeks. I was wanting to get the Air Ride beforehand. Does anyone know what the measurements are for the 377FLIK??
Just tel the dealer you want it to have an air ride pin box he'll call FR and they will put it on most likely a trailride air ride thats the way i did it. It only has 4 bolts to change it
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