didnt know a 93 cherokee had a rear track bar, the track bar locates the front diff center of the jeep,if your jeep is leaf sprung in the back there is no track bar.
If it's a grand cherokee anything over about 2" you will need to address the track bar. I have gone with an adjustable one as well as drop brackets on ones I've built and the adjustable works a whole lot better. A 3" will move the axle about two inches over so you will need to do something. As stated a regular cherokee doesn't have a rear track bar only one in the front.
A Cherokee does not have a rear trackbar. A Grand Cherokee does have a rear trackbar. You might be able to get by without doing anything for the rear trackbar of a Grand Cherokee with a 2" lift, if you can live the axle being slightly off-center.