Abstract: The universal spring stabilizer of the present invention includes a unitary spring stabilizer which is universally adaptable for use with most passenger car multi-leaf type rear springs. The spring stabilizer includes integral mounting constructions which facilitate securing the stabilizer to the car spring. The universal spring stabilizer acts to add a leaf to the rear spring and by virtue of its design, functions in a manner to work against the arch of the spring. The length of spring steel of which the stabilizer is fabricated is bent to overfit the spring suspension and includes front and rear riveted cross plates which function with U-bolt connections to secure the stabilizer to the passenger car rear spring. The stabilizer is formed front and rear with two spaced pressure points to apply the effects of the stabilizer to the existing spring at four spaced pressure points, two forwardly of the axle suspension and two rearwardly of the axle suspension.