Originally Posted by coilrod
Also roll center can affect the way it handles. My 2.5 rk lift came with a track bar bracket that raised the roll center to match increased height. have since swapped different parts in/out and now my front and rear track bars are on slightly different planes. I can feel it. So if yours are still stock (and I did not see that there were either drop or lift brackets in your link) the lift did raise the center of gravity without addressing the roll center. Also leads to a feeling of instability. I am not an expert, have read enough to recommend you phone the tech guys at poly performance or rock krawler. Very informative and helpful for me.
Higher rear is preferred. synergy runs a higher bracket (4") when running a front steering correction kit with raised front (3")
The other rear bracket and like RK's is 3" I believe.
My Rear TB is set using TF's 2nd hole @ 4"
Front Artec bracket raises the TB 3"
I completely agree, this is from the lift sticky
Roll center/trackbar brackets adding lift height lowers the jeeps roll center. this can cause poor corner handling/steering. Raising the track bars at their mounting points will return the roll center to stock or higher. also keep the axle better centered during articulation.
oversteer/understeer Raising the rear track bar alone (front remains stock)= A positive roll axis/understeer. a little understeer is a good thing.
Raising the front trackbar alone (rear remains stock)=a negative roll axis/over steer. oversteer can cause handling to be unpredictable. you definitely don't want this.
Most kits in the 2.5+ range will address the rear. Notes:
- A shorter wheel base 2 door, oversteer/understeer will be more pronounced.
- The front track bar can not be raised without flipping the drag link or running a drop pitman arm (see steering correction kit)
- track bar drop brackets only purpose is axle positioning or axle center. usually supplied in cheaper kits.