We tried running at first without a track bar. Not a good plan. The steering would push the front around and the front would walk side to side. The ’80-and-up Wagoneers (our axle donors) had track bars, and anyone using their suspensions and axles for a truck build should also include the track bar. Even after the Rancho leaves were put on, we still needed the track bar (of course we had to try without it). Remember that a track bar needs to be parallel (or close to it) with the steering draglink.