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Old July 25th, 2014, 07:26 PM   #26
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Default Re: Rear swing axle air suspension

Okay excuse me if i sound a bit like idiot.. But i'm trying to figure out how this rear torsion set up works.. From what I gather.. the rod has inner and outersplines. I'm trying to visual this and searching online isn't really helping me much. I see the individual parts.. not really how they all connect together.... Nvm this picture kind've helps.

Now I have a question? Could one possibly attach a gear to the end of one of these bars and from a bag system, use the bags to actually lift and lower the system.... using maybe a rack and pinion set up? That way the bag would be mounted to the rack part and the Gear would be the pinion. Sure it'd be alot more work then paddles but I think it could potentially allow for more mounting. Or maybe even a crank shaft like design

I'm trying to think of solutions crazily... Paddles make sense? It sounds simpler and easier its just my brain can't handle simple... Probably why I'm a steampunk
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Old July 25th, 2014, 07:56 PM   #27
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Default Re: Rear swing axle air suspension

Torsion bars are springs used in a rotational manner. So one end is stationary while the other rotates. I understand what you mean by a "rack and pinion" style but that wouldn't do much justice with the torsion bar because the more you rotate the bar the stiffer it gets so you don't want that, the bags will be fighting.

The photo shows a IRS axle, easier to put a bag on the trailing arm to move up and down. Problem with this method is the upper bracing, it can be weak if not done properly. With swing axle it's more complicated as you need to add a trailing arm, loosen the torsion bars to reach max lower position (both swing and irs).

As for me I will remove the torsion bar completely and make a custom heim joint, in actuality it's not that hard to fab up. My shock would be my "torsion bar". It's just another way to dampen the ride for driveability.

Last edited by livin_in_a_cell; July 25th, 2014 at 07:59 PM. Reason: Added tidbits
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Old July 25th, 2014, 08:07 PM   #28
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Default Re: Rear swing axle air suspension

Look up "Let the flogging begin" I have my own thread of stupid questions that I use to this day. (Gotta keep that much stupid contained). Some with airbag questions and answers attached. You will always catch shit asking the noob questions like all new people do (including myself) because its a dead horse. But youve already been told that by everyone else already.
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Old July 25th, 2014, 08:54 PM   #29
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Default Re: Rear swing axle air suspension

Just to clarify things, the six pack I mentioned is of the beer variety. Although Sherrie made up a couple of really nice margaritas this evening.
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Old July 26th, 2014, 12:43 AM   #30
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Default Re: Rear swing axle air suspension

I was thinking that (sorry for the noobie question.. seems a bit on topic on the off topic derail! never had to really think about the rear torsion bars ) .. Since air bags are usually used as replacements.. So just remove the torsion bar. Maybe replace it with just a metal rod or something with the paddles welded on? I mean airbags are usually used as basically shocks and coil replacements. You'd be turning the swing arm into a giant almost lever shock. with the bags mounted under the rear seat.. or near that location.. or in luggage tray if that hasn't been taken away for the many reasons it would be in a volksrod.
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Old July 26th, 2014, 08:50 AM   #31
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Default Re: Rear swing axle air suspension

V8Transporter, I just had to re-read what you said. That may work, I can see it now. Lol. I would use some type a bushing on the inner spline though. And to get away from welding you may be able to clamp around the bar as in make it square then have a clamp to hold the arm to the bag. I should really draw it? I just may do a quick hand sketch a little later.
I just don't know if I could completely trust it though.
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Old July 26th, 2014, 01:15 PM   #32
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Default Re: Rear swing axle air suspension

The clamp idea is a good one. You could probably grind a reasonable flat spot, maybe 1/4" deep without compromising torsion bar too much...I've done crazier, I mean, more radical mods. A second 'access hole' on the opposite side of the housing might be needed to install the bolts for the clamp. The 'paddle' bolts could be welded to use as studs. The paddle slipped into place with its half of the clamp engaging the bar, then the back half of the clamp slipped in through the access hole, the nuts attached, torqued, and viola. You'd still have some outer adjustment of the spring plates, in relation to the initial paddle angle. I see a lot of careful planning, and head scratching.
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Old July 26th, 2014, 01:20 PM   #33
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Default Re: Rear swing axle air suspension

Oh, another thought. (I know, you thought you were safe.) Top and bottom at the paddle slot, outward from the housing, a 1/2" lip to attach a flat piece of rubber so the paddle handle will slap against that instead of the metal housing, if you drive over a RR track, or something else interesting at speed.
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Old July 26th, 2014, 01:37 PM   #34
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Default Re: Rear swing axle air suspension

Tons of great ideas, I love all the ideas. Does anyone know where to get heim joints locally? Every idea I have includes them.
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Old July 26th, 2014, 02:08 PM   #35
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Default Re: Rear swing axle air suspension

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Tons of great ideas, I love all the ideas. Does anyone know where to get heim joints locally? Every idea I have includes them.

Try that Google bitch, she knows everything.
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Old July 26th, 2014, 03:12 PM   #36
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Try that Google bitch, she knows everything.
She does, she must of been drunk today. She was bringing up all sorts of unrelated crap, typical female
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Old July 26th, 2014, 03:36 PM   #37
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Default Re: Rear swing axle air suspension

A while back I bought a couple half inch male heim joints at a nearby trucking supply. Turned out they had a lot a pretty good selection on their shelves.
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Old July 26th, 2014, 04:00 PM   #38
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Default Re: Rear swing axle air suspension

If you call them "rod ends", you find places like this:
http://www.floridabearings.com/products.htm
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Old July 26th, 2014, 05:56 PM   #39
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Default Re: Rear swing axle air suspension

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If you call them "rod ends", you find places like this:
http://www.floridabearings.com/products.htm
I will contact them on Monday, thanks for the tip.
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Old July 26th, 2014, 06:03 PM   #40
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Default Re: Rear swing axle air suspension

I also found that fastenal and grainger has them, if anyone wants to know.
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Old October 29th, 2014, 04:18 PM   #41
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Default Re: Rear swing axle air suspension

I finished the rear suspension, here's some pics






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Old October 30th, 2014, 02:00 PM   #42
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Default Re: Rear swing axle air suspension

Great progress! And looks great too.
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Old October 30th, 2014, 02:19 PM   #43
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Default Re: Rear swing axle air suspension

Thank you, it is coming along slowly. I finally got some time today to work on it and my welder crapped out so after 2 hours of trying to figure out what was wrong with it my day was gone. At least it's still under warranty, got a replacement.
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Old October 30th, 2014, 08:35 PM   #44
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Default Re: Rear swing axle air suspension

could you explain how the system works.. i have a condition when ever I see a mechanical system I don't grasp I MUST know how it works.. It's a condition or something..
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Old October 31st, 2014, 04:48 AM   #45
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Default Re: Rear swing axle air suspension

It's really not that complicated, the upper bag mount is fixed in place. The lower mount pivots when it goes up and down. One side of the lower mount has bushings and brackets that allow it to move back and forth and the other side has a large off road heim joint that allows it to pivot. I had to extend the lower shock mounts due to the trans raise and the shocks were bottoming out with 2" of clearance left. With the extended mounts it sits on the ground. I took ideas from everyone and combined the best ones to make this. The front is air shocks with the fittings bored out to accept 1/4" lines. The beam has adjusters that are set to allow movement, but not be loose. Hope this helps
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Old October 31st, 2014, 11:07 AM   #46
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It's really not that complicated, the upper bag mount is fixed in place. The lower mount pivots when it goes up and down. One side of the lower mount has bushings and brackets that allow it to move back and forth and the other side has a large off road heim joint that allows it to pivot. I had to extend the lower shock mounts due to the trans raise and the shocks were bottoming out with 2" of clearance left. With the extended mounts it sits on the ground. I took ideas from everyone and combined the best ones to make this. The front is air shocks with the fittings bored out to accept 1/4" lines. The beam has adjusters that are set to allow movement, but not be loose. Hope this helps
Got it! :Thumbsup:
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Old October 31st, 2014, 01:47 PM   #47
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Default Re: Rear swing axle air suspension

Looks Great

I so need to get my lower shock mounts fab'd up, make for a good winter project


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