The paper describes a non-destructive testing (NDT) technique used on suspender ropes to detect either cross section loss or broken wires located on either the interior or exterior of a rope. The technology relies on the principles of magnetostriction to generate a guided acoustic pulse that travels up and down the rope. Where there is a defect in the rope resulting from corrosion or fatigue damage, a portion of the pulse is reflected back to the source. These reflections can be measured and quantified to determine the relative size and location of corrosion or fatigue damage on a suspender rope. This technique does not use magnetic flux principles, which has been used on suspender ropes in the past with limited success. This paper discusses the principles of using megnetostriction to test the condition of suspender ropes and the capabilities and limitations of such an approach.