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Suspension sagging with load


 
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LoneSpar
Member


Joined: 19 Aug 2007
Location: Oregon

PostPosted: Tue Nov 20, 2007 10:27 pm    Post subject: Suspension sagging with load Reply with quote

I just took my first family trip in my stock height XJ. With all of
our gear loaded in the back, my bigger-than-stock tires were rubbing on
the fenderflares when we hit a bump. I was thinking an add a leaf my be the thing I
need. Does that sound right??? Any suggestions??
Thanks!
Rob
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Old Chevy Trucks
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DavidXJ
Member


Joined: 07 Sep 2006
Location: Visalia, CA

PostPosted: Wed Nov 21, 2007 7:36 am    Post subject: Reply with quote

People are going to flame me for this but...

Go to your local parts store and pick up a set of Gabriel Hi-Jacker rear air shocks for $70. This way, when you load it down, you just pump up the shocks and it helps offset the extra weight, but for regular loads you can keep the pressure down so it rides smoother. With an add-a-leaf you risk making the rear of your XJ more stiff. I have run a set of air-shocks on my 1998 XJ for 3 years... even ran the Dusy Ershim with them a few weeks ago, and they held up fine. As far as flex, I haven't noticed a difference. But then again, I wheel with only a 1.5" lift and all my swaybars connected. So with a stock XJ, this would be the cheapest and easiest solution.

Granted, I have slightly larger than stock tires, and with all the gear loaded the tires will still rub the rear fender wells when I hit a bump going a bit fast, even with the shocks pumped up and the plastic flares removed. But an add-a-leaf isn't going to prevent this either. The only thing that will stop that is some sort of extended bump stop in the rear... or cutting out your fenders.
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Brad The Best
Member


Joined: 14 Jan 2007
Location: Kamloops B.C Canada

PostPosted: Wed Nov 21, 2007 6:36 pm    Post subject: Reply with quote

do you mean some sort of shock that goes in the location of the shock absorber .

those mounts on the uni-body are not made to support the weight of the vehicle i do not recommend this since my jeep when it was purchased had coil overs in that place and had the hole cross member pushed up and bent the crap out of the floor .

if you want air bag helper's go get some air bags , i would just use cab air bags from a semi . probably get some used ones for free .
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DavidXJ
Member


Joined: 07 Sep 2006
Location: Visalia, CA

PostPosted: Sat Nov 24, 2007 10:44 pm    Post subject: Reply with quote

The air shocks are not supporting the weight of the vehicle. They are just helping out a little. If some nut-job used the shock mounting locations to mount coil-overs on your jeep before you bought it he should never be allowed to fabricate again. Everything about that is insane. But a simple pair of air shocks are only helping out with the extra weight of the temporary load that's causing the rear of the vehicle to sag. Compared to the extreme forces put on the shock's mounting locations by every bump when driving fast over a pot-hole laden road in Michigan, I don't think a couple hundred pounds of extra weight will hurt them. I think these shocks would be fine. So far I've been running them for 3 years, and in my regular inspections I haven't noticed any problems like bending, cracking, etc.

I do agree that air bags, like the Firestone Ride-Rite or the Air-Lift type, would be a better idea when it comes to supporting extra weight. They would suck for rock-crawling and there would be a lot more fabrication and an air system involved, but it wouldn't put as much stress on the unintended locations. But then again, maybe an overload spring would be the least complicated. The guys at GoJeep have write-ups on overload springs I believe.
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ThePhantum
Pissed-Off Admin
Pissed-Off Admin


Joined: 23 Jan 2004
Location: I knew it...I'm surrounded by Assholes!

PostPosted: Sun Nov 25, 2007 9:03 am    Post subject: Reply with quote

Find a beater XJ and get the rear leaf springs. Take the pack apart to get to the main leaf. Cut the spring eyes off and use it as an add-a-leaf to your pack. It will only add an inch or less of lift, but since it's just a stock leaf, it won't sag like aftermarket AAL's. In addition, it will retain the stock ride and reduce rear end sag under load.
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Orangeamc13
Got Rev Limiter?
Got Rev Limiter?


Joined: 20 Feb 2006
Location: East Springfield, Massachusetts - U.S.A.

PostPosted: Sun Nov 25, 2007 9:41 am    Post subject: Reply with quote

Check this out!

http://www.jeephorizons.com/phpbb/viewtopic.php?t=10730

Just use one leaf if you don't want much lift.

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