I remember the rear track bar bolt being a pain. I used heat on the nut and it was still a pain to get off. Cut it, heat it, what ever, just remove it.
Remove both track bars and you will be very happy with your ride. One guy on here stated to save them for inspections. Why do people say things they know nothing about? Track bars are not needed on a Yj, unless you go SOA. Then it is a completely different track bar setup that is used.
Stock track bars stop articulation and cause a rough ride.
With stock track bars your Yj will have a buck board ride. Without, you will enjoy your Yj much more.