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Discussion Starter #1
SO. I Installed a 3"zone lift on my 05 tj.
Slight vibration not bad at all.
But highway driving is defently not good. No D/W but feels likei stearing could go out of control if i have to switch lanes quickly. So would adjustable track bar help? Or adjustable controll arms?
 

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Discussion Starter #4
Toe? I had a shop do it. Simple kit. Spring track bar relocater mounts etc. No control arms
 

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Your alignment is off causing the steering issues you are experiencing. You can easily set the toe in your garage Using hand tools. Plenty of informative write ups and videos out there for reference. Done it myself many times with excellent results.
 

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I did the 4.25 Zone combo which is the 3" lift and a 1.25 body lift and my caster was low until I put on the control arms. It sounds like TJ's are more forgiving than JK's, but mine needed help. Fortunately I had arms ready to go.

You'll want your toe set, and since you have drivability issues, I'd have it put on the alignment rack and let them tell you what your caster is and set your toe.

If you're looking for a basic fix, I like the Core4x4 Tier 3 front lower control arms. Great product at a good price.
 

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Discussion Starter #7
Ty, guys I bought R/C lower adjustable control arms. Going to install them this weekend. Then I'll run it to a Alignment shop.
 

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I recommend adjustable upper control arms also.
Use the front lowers to position the bump stops and set the axle square. Use upper control arms to adjust the front pinion angle equal or 1 degree higher than the front drive shaft angle. Caster will be whatever it is after setting pinion angle. Front pinion angle has priority over caster.
Assuming you have a stock rear drive shaft, use the rear uppers to adjust the rear pinion angle, so that it closely matches the angle of the transfer case output shaft. If you continue to experience vibration from the rear, a transfer case drop and/or engine lift will provide a less steep driveshaft angle to work with. Rear upper control arms work in concert with rear lower control arms to position the axle, so that nothing is making contact where it shouldn't be making contact. Example: rear trackbar relocation bracket contacts the fuel tank skid. Like the front, the rear lower control arms can be used to square the axle, in addition to setting healthy u-joint operating angles.
If after adjusting the rear drive shaft u-joint operating angles, vibration continues, it is time for an SYE and DC driveshaft.
 

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SO. I Installed a 3"zone lift on my 05 tj.
Slight vibration not bad at all.
But highway driving is defently not good. No D/W but feels likei stearing could go out of control if i have to switch lanes quickly. So would adjustable track bar help? Or adjustable controll arms?
I have the 4.25" kit, no issues after the upgrade. But the geometry was done at a specialist, post lift.

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