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Old 07-28-2016, 03:23 PM   #1
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Air-Ride PinBox

I was just looking at the FlexAir pinbox when I noticed that the AirRide pinbox doesn't have the lower plate with the grease fittings on the lower jaw anymore. Looks like it doesn't slide and is welded now.

Could it be that Lippert had to respond to incidents of broken lower jaws/repairs as was reported on this forum (and probably others)?

While the FlexAir seems the better product, it's good to see that the TrailAir is evolving...
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Old 07-28-2016, 03:53 PM   #2
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As far as I know, you have three choices: Rota-Flex (just the pivoting King Pin, no air bag),
Air Ride (air bag, but fixed King Pin), and the Flex Air (Rota-Flex King PIn on lower jaw, with the Air Bag).
The Tri-Glide is gone for consumer purchase. Lippert must still be using up parts selling the Tri-Glide to Manufacturers.
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Old 07-28-2016, 08:55 PM   #3
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I now have just under 1000 miles on my new flex air pim box, and like it.. The Trailer seems to glide better going down the road , One very short stop and I did not have the feeling of the bottom plate jarring forward ... Its a winner
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Old 07-28-2016, 09:20 PM   #4
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Which FlexAir model did you get?

It looks like the 18K Lippert #328492 is the replacement model for the L05 on the Redwood? They also make a 21K but I can't find one listed anywhere.
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Old 07-28-2016, 11:06 PM   #5
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When I bought mine they only came in 18k which is more than enough for our trailers
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Old 07-29-2016, 01:56 AM   #6
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I put my 3/4 inch drive socket set in the RW this AM, so if we have a Pin Box changing party I've got the heavy duty socket set to do it with.
Like the report on the FlexAir, I've been on the fence and that may just push me over.
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Old 07-29-2016, 02:24 AM   #7
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Quote:
Originally Posted by mhs4771 View Post
I put my 3/4 inch drive socket set in the RW this AM, so if we have a Pin Box changing party I've got the heavy duty socket set to do it with.
Like the report on the FlexAir, I've been on the fence and that may just push me over.
They may be hard to change in a campground.... I struggled in my driveway..

I had a 500# capacity rolling table with a 2 ton floor jack sitting on 6" wood blocks ratchet strapped to it so it would not roll... Used an impact gun to remove the bolts, had to get out my 3/4" drive set, and 5' steel tube for some leverage on a few... I also had to replace 3 of the bolts, they were stripped from removing them...
Black and Blue Forearms,, ( now I am complaining ) , BUT IT WAS WORTH IT..

Use someone's tailgate as the rolling table... Use a floor jack also...
I have to get the part number, don't know it off the top of my head...
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Old 07-29-2016, 03:32 AM   #8
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I would agree, I removed my failed Trail Air and replaced it with the new Trail Air Redwood shipped to me.
That pin box is very heavy and awkward !!!!
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Old 07-29-2016, 03:34 AM   #9
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Quote:
Originally Posted by mhs4771 View Post
I put my 3/4 inch drive socket set in the RW this AM, so if we have a Pin Box changing party I've got the heavy duty socket set to do it with.
Like the report on the FlexAir, I've been on the fence and that may just push me over.
I will have my 1/2 Inch Impact Gun, Air Compressor and Impact Socket if yall want to have a pin box changing party.
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Old 07-29-2016, 07:14 AM   #10
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I thought I read somewhere that the best way to disconnect it is when you have it hooked up to the hitch in the truck. Seemed to make sense to me.
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Old 07-29-2016, 02:11 PM   #11
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I changed mine out with the the tailgate and a bottle jack. Not hard with a couple people
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Old 07-29-2016, 02:15 PM   #12
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Just put 2200 miles on mine and I like it now I have it adjusted properly. The problem was setting the air in the pin box and the bags on the truck so they weren't fighting each other.
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Old 07-29-2016, 04:34 PM   #13
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Just put 2200 miles on mine and I like it now I have it adjusted properly. The problem was setting the air in the pin box and the bags on the truck so they weren't fighting each other.

So far I have found that with the new Flex Air , 75 in the pin , and 35 in the truck works pretty good.. I will finish tweaking it on the ride home from SC
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Old 07-29-2016, 09:35 PM   #14
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Quote:
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Just put 2200 miles on mine and I like it now I have it adjusted properly. The problem was setting the air in the pin box and the bags on the truck so they weren't fighting each other.
Shane,
What bags are you using on your Denali? I have the same truck.
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Old 07-29-2016, 09:47 PM   #15
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Ken
I have Firestone bags with on board compressor
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Old 07-29-2016, 09:54 PM   #16
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Do you feel the Firestone bags were worth it? We will be FT early next Spring and do need to make the DW happier (and yes, "my life" too) with a less bumpy ride. Our trip back to SoCal from Tennessee was not too bad, but I know it could be better. Los Angeles freeways are the worst!
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Old 07-29-2016, 10:07 PM   #17
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They are well worth it. I run them at about 15 lbs when empty and smooth out the ride.I have had bags on my trucks for the lastb20 some years. The best investment with them is the on board compressor so you can adjust them on the fly. They are a bit of a pia when doingredients it manually until you find the air pressure you want
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Old 07-29-2016, 10:26 PM   #18
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I thought I read somewhere that the best way to disconnect it is when you have it hooked up to the hitch in the truck. Seemed to make sense to me.
It makes it a lot easier to leave it hooked up to the truck.
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Old 07-29-2016, 10:45 PM   #19
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The problem with leaving it hooked to the truck is once it's off you have to man handle it off the Hitch. Instead of lifting it off the tailgate
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Old 07-31-2016, 01:32 AM   #20
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I use a cherry picker and a moving dolly to roll it away. a one man band.
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