Brake judder is a critical concern in modern automotive systems, impacting both vehicle performance and passenger comfort. This phenomenon manifests as undesirable vibrations during braking, often caused by various factors such as vehicle architecture, different wheelbase, brake design considerations, load distribution, suspension characteristics etc. These vibrations not only compromise braking efficiency but also affect the overall driving experience, making it a priority issue for automotive engineers and researchers. This paper investigates the root causes of brake judder in a M3 Bus category vehicle having pneumatic brake system, focusing on its mechanical aspects and operational dynamics. By employing a combination of experimental testing and analytical evaluations, the study delves into the influence of brake torque generation and its consumption during vehicle deceleration for different wheelbase vehicles having similar brake system, revealing discrepancies that contribute to the occurrence of brake judder. In addition to experimental methodologies, advanced techniques, including subjective and objective assessments, are employed to characterize judder behaviour across diverse braking scenarios. These include varying load conditions, different road surfaces, and distinct braking intensities, providing a comprehensive understanding of the judder's manifestation. Results from the study highlight key strategies for mitigating brake judder, such as the optimization of suspension design to enhance vibration damping and precise control of rear brake pressure tailored to load conditions. Ultimately, this research contributes to the investigation & analyze the different aspect contributing to the Brake judder & how to mitigate the same through rear pressure control. Step by step approach by the part swapping analysis & integrating pressure control system for more reliable and comfortable braking systems. By addressing the multifaceted nature of brake judder, the findings pave the way for advancements that elevate both the engineering and functional aspects of modern braking systems.