Coil Correction Kit on TJs

[rdking3]

I read an article about installing a coil correction kit on the rear of TJs to help with coil rearward bow on the rear coils. This occurs on lifted TJs. I have a 2005 Rubicon with a 3" lift and with any extra weight in the Jeep, the rear coils bow badly, causing the bump stops to bottom out. Rockcrawler .com has an article about installing a coil correction kit on the rear to bring the forward leaning coils to a straight up position, eliminating the bowing.
Hear is my question:
The spring brackets need to be cut off and the new brackets welded in the straight up position. On the driver's side that will work. On the passenger side, the track bar is in the way and the new bracket can only be moved 1" forward, not allowing for a straight up position.

Has anyone installed one of these kits and know the fix? Can anyone guide me to someone who can help?

I called superlift, but got no help, just the standard answer. "We haven't had a problem."

Thanks

 

[Cannonball]

I have had 3 TJs and lifted them all........ none had springs that bowed back.

A Jeep TJ rear suspension is basically a 4 link suspension when you raise the Jeep with a spring the upper and lower control arms keep the axle pad & axle dropping and raising in parallel so the pads are in line with each other.

If you are going over 4-5" lift then you need longer control arms or a long arm kit that will keep the axle geometry more centered under the upper spring pads.

The only way this parrallelagram could change would be if you lengthened or shortened the uppers or lowers.....

Or if you got an aftermarket control arm that is shorter then the upper and is traveling so much the entire axle is pulling forward when it drops. In this case you need a long arm kit to correct the geomerty.

Simply relocating the spring pad will only correct the situation for the position the axle is in when you relocate & weld it. Once the axle starts to droop or raise going throught its arc the pad will go from forward when drooped to rearward when stuffed.

I have heard about poorly manufactured coil springs that bowed badly.....in fact I had some! But this resolved itself when I replaced them with Rubicon Express springs. The life I had used was a cheap one..... Ill only use a good lift now. I am running Short arm kits with 4" & 5.5" suspensions and have no issues with springs knocking off the bump stops.

I do however have enough flex that will allow the spring to drop out of the pockets..... this may be happening to you and when they pop back in you are hitting the bumpstop and knocking em or bending them?

Hope this helps

CB

 

[CTFJ]

Having installed dozens of TJ lifts, if the rear coil buckets are so far off that your coils look arched, you're in need of a long arm lift or cutting & reseting the angle on those buckets. too much lift, not enough adjustment of everything else.

I've also seen this happen in cases where the pinion angle gets angled up pretty high when installing a SYE kit and CV driveshaft.

But in your case- you're saying you only have 3" of lift and you are bottom to the bumpstops. That should not be happening- those coils (whatever they are) SUCK (spring rate way too low). They're bowing out because they are overloaded.

Instead of correcting that angle, I would get different 3" springs. Rubicon Express have a decent spring rate. Loads of used ones around.

*EDIT- just saw I resurrected a log dead thread. Sorry for the zombie.