A rear-wheel-drive vehicle's Cardan shaft, a rotating shaft that transfers power from the engine to the differential gear, must work via continually shifting angles between the gearbox and axle. Due to the constant rotation, there is significant vibration on it. Due to this issue, the shaft frequently bends or deforms. Vibration in the Cardan shaft is a significant issue. In the present work, three distinct geometries—circular cut, rectangular cut, and no-cut—were modelled using SolidWorks software. Modal analysis was then carried out to obtain the deformation and natural frequency of all the CAD models for comparison. In the current investigation, the rectangular cut model, which produces the least deformation and natural frequency, was designated as the superior model.