Question about my York compressor
I don't know about the rear trac bar because I've never loosened it before. If it's anything like the front, the hole the bolt goes through isn't round, it's more oval, allowing for the bolt to move if it isn't really tight. You could try loosening off the bolts, jacking the jeep up by the rear bumper so both rear tires are in the air and shifting the rear axle over. This is how I've done the front in the past.