Re: traction bars?
Traction bars are hefty rigid bars or tubes of tempered steel with pivoted brackets on both ends. The front ends of the bars connect to the front spring mounts on the vehicle frame. The rear brackets bolt to the bottom of the drive axle. Traction bars keep the axle from twisting backwards while it forces the drive wheels to turn forwards, completely eliminating leaf spring windup, and keeping the rear drive wheels forced down to the pavement for superior traction.