A TRACTION BAR is something entirely different! A Traction Bars purpose is to prevent the axle from wrapping (or basically twisting front to back) under heavy acceleration. They do not limit the flex of the suspension.
This is a Traction Bar:
A TRACK BAR is something entirely different. Its purpose is to keep the axle centered left to right underneath the vehicle. With leaf springs, a Track Bar will bind up the entire system. You generally see Track Bars (sometimes referred to as Panhard Bars) in coil spring applications, or in the front of leaf sprung vehicles to aid in stability while towing large loads.
This is a Track Bar (the flat black bar):
For general purposes on Jeep Wrangler YJ's, you do not need a Track Bar. They limit flex (sometimes manufacturers install them with leaf springs intentionally) by binding up the system- the way leaf springs articulate is not in the same path of the Track Bar. However, in a Coil Spring application, a Track Bar does not bind up the system since the coil springs can move in the same arch the Track Bar does.
For a big trucks with leaf springs (such as a Ford F-250) you will typically see a Track Bar on the front axle because such a truck is designed with the intentions of towing large loads behind it (15,000lbs or more). That bar aids in stability while towing, but since a Jeep is not a big truck and since you won't be towing anywhere near that kind of load you do not need a Track Bar on either the front or rear axle.
I removed my rear.
Drove around like that.
Didn't notice any negative side effects
I then removed the front
I will say it does fill a bit lazier when entering a corner a bit fast but, its a jeep.
I kept the sway bar. I'll most likely get quick disconnects if I ever feel I need more flex.
Just know your jeep and know how it handles.
And more on the Track Bars I advise to remove them if you have bumpy roads.
When both left and right springs compress the distance between the axle and the frame decrease and the track bar does not thus it pushes or pulls (depends on how you picture it) on the axle and will give you a slight jolt to one side or the other and it will do a number on your frame if you hit the bumps hard enough and often enough.
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