Rear 4 link w/SAW air shocks progress pics

This thread has gone wrong....REALLY WRONG!

I can't believe I'm looking forward to wheelin with you guys.

I also can't believe my wife got a hold of the computer and has been saying those things, pretending to be me.

Everybody knows I'm hot for Lupine, not that sweaty farmer.

Rick
 
Rick XTRM XJ said:
As many of you have, I've gotten tired of leaf spring issues in the rear of my XJ. It's time for something new.

I picked up a pair of 12" Sway-a-way air shocks for a pretty good price from a friend, and here's what it lead to......

Inside:
450588544XJGmir_ph.jpg


The rear bar of the "ladder" is the upper control arm mounting point. The arms will come through the floor and mount to it. The forward bar supports the lower control arm brackets here:
450587703iPRYSO_ph.jpg


The shocks will come up through the floor outside of the framerails:
450587881gEJQNh_ph.jpg


The shock on the left is at ride height.

The axle truss is a Rockrawler part.

So far, so good.....the only possible issue I see is the length of the uppers. They are probably only 75% of the lowers. I could rework the "ladder" a bit if I need to lengthen them.

More pics to come once I have the links built.

Rick

Edit: BTW, the rear seat will be fully functional as I have 2 kids that go with me from time to time.


What size tire and about how much lift do you think you did in the rear? Also what size air shock is it? I see 12" but what diameter?
 
I like your design. That's original and looks like it will/does work quite well. :)

However, Im pondering the propensity for your rear UCA's to violate your rear seat passengers should those modest link tabs decide to give up the ghost.

Pinion drops, UCAs go up and forward, and ..... :shocked: :confused1
 
ROBERTK said:
What size tire and about how much lift do you think you did in the rear? Also what size air shock is it? I see 12" but what diameter?

35" tires.

Approx 6-7" lift, depending on pressure in the shocks.

Shock is a 2" Sway-a-way air shock, 12" travel.

Rick
 
ArcticXJ said:
I like your design. That's original and looks like it will/does work quite well. :)

However, Im pondering the propensity for your rear UCA's to violate your rear seat passengers should those modest link tabs decide to give up the ghost.

Pinion drops, UCAs go up and forward, and ..... :shocked: :confused1

I guess they would both have to break for that to happen. I doubt that it would happen (the "modest" tabs are "gusseted"), but I guess that could get ugly.

I only have the kids riding in the backseat maybe a couple times a year, and for some reason they seem to bail out when the rocks get big.

Rick
 
Any updates?
Pics?
How'd it do in Moab?
 
kid4lyf said:
Any updates?
Pics?
How'd it do in Moab?

Did great in Moab. Very stable off camber. Not scary at all dropping off big ledges. Mounting them outboard of the framerails is the ticket.

Punched in my numbers into the 4 link calc. Came up with 89% AS and a roll axis of 7 degrees. Rear steer so far has been a non-issue. Had to jockey around a bit in the Escalator to get the right rear tire on the wall, but so did everybody.

Driving to the trail can be a bit noisy due to all the heims on the jeep. 17 total, now. It soaks up the bumps nice, just noisy. The cage has started creaking a bit while crawling, since the rear suspension is now hanging off of it. I added a couple more frame tie-ins at the back, and it helped a little.

I think I am at about the max weight of the airshocks, though. Going up from 250 psi to 315 psi, really didn't gain me much lift. They'll still stuff no problem when flexin on the trail.

I just tried downloading to Webshots a couple pics from Moab, down in Area BFE, flexin it up, but couldn't. I'll try again later.
Rick
 
Rick XTRM XJ said:
Did great in Moab. Very stable off camber. Not scary at all dropping off big ledges. Mounting them outboard of the framerails is the ticket.

Punched in my numbers into the 4 link calc. Came up with 89% AS and a roll axis of 7 degrees. Rear steer so far has been a non-issue. Had to jockey around a bit in the Escalator to get the right rear tire on the wall, but so did everybody.

Driving to the trail can be a bit noisy due to all the heims on the jeep. 17 total, now. It soaks up the bumps nice, just noisy. The cage has started creaking a bit while crawling, since the rear suspension is now hanging off of it. I added a couple more frame tie-ins at the back, and it helped a little.

I think I am at about the max weight of the airshocks, though. Going up from 250 psi to 315 psi, really didn't gain me much lift. They'll still stuff no problem when flexin on the trail.

I just tried downloading to Webshots a couple pics from Moab, down in Area BFE, flexin it up, but couldn't. I'll try again later.
Rick
Nice, I just revalved the shocks (more compression dampening) and moved my upper mnts up to allow about 30 PSI more air pressure (220PSI now). That had a dramatic effect.
I took it out and did a couple donuts to move everything around and it felt much more solid.
The heims were a close second to the shocks in the largest expense race.
14 RE superflex joints at $40 each.
 
kid4lyf said:
Nice, I just revalved the shocks (more compression dampening) and moved my upper mnts up to allow about 30 PSI more air pressure (220PSI now). That had a dramatic effect.
I took it out and did a couple donuts to move everything around and it felt much more solid.
The heims were a close second to the shocks in the largest expense race.
14 RE superflex joints at $40 each.

what did you use 14 joints for?
8 for the links...

2 on each airshock?

thats only 12...
 
XJ_ranger said:
what did you use 14 joints for?
8 for the links...

2 on each airshock?

thats only 12...
8 for rear links, 5 for URF 3 link front (plus one 1" heim), and one on the trackbar.
 
Very nice. What front springs are you running?
 
Dear Rick,

Your junk sucks.

Love, Crash
 
Yep.......and it'll suck in JV two weeks from now.

Oh wait.......you won't be there to see it suck, will you?

That sucks.


Love,

Rick
 
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