i ran without a sway bar up front and no track bar in the rear no problem, '95 YJ
like he ^ said, TJs have coil springs and you def need both up front if you drive it on the street and regardless if it's street or offroad there's no way to drive the TJ without a track bar, the axle would shift sideways
traction bar is a different thing, it's used on leaf springs to prevent axle wrap.