TruHart traction rods also allow for fine-tuned adjustments to the rear suspension geometry. By changing the length of the traction rod you change the position and pitch of which the suspension rotates upon and you change the amount of "Anti-Squat" of the rear. Although the adjustment is minimal, it can change the behavior or the vehicle during weight transfer and will elliminate "wheel hop" when launching from a standstill. Best combined with adjustable upper and lower control arms.