In this study, an involute gear pair is designed and fabricated. A test rig is assembled to carry out the experiment in which the driving gear is subjected to different crack levels and its vibrational signatures are studied using vibrational analysis. Generation of a two-level severity root crack on the gear model for the simulation segment is done using SOLIDWORKS, and cracks of the same dimensions are replicated on the fabricated gear using a Wire-Cut Electrical Discharge Machine. The vibrational properties of the motor are then recorded under different speeds and loads for both crack severities and are compared to that of a flawless gear of the same properties and dimensions. This further allows us to observe the effect of operational parameters on the vibrational properties of the motor that runs the defective gears. This study reveals the relationship between the waveforms of the vibration and cracks severity of the gears along with parameters such as varying speeds and loads.