Conventional tractor transmission systems feature separate Brake and Bull Cage housings, with brakes often being proprietary components and Bull Cage designed by the Original Equipment manufacturer (OE). To optimize design and performance, an innovative integrated system was developed, combining an in-house braking system with a unitized Bull Cage assembly. This robust design reduces part count, eliminates proprietary dependency (except for friction liners), and enhances performance. Virtual simulations performed under RWUP conditions demonstrated enhanced strength and stiffness in the integrated design. In this Integrated Brake & Bull Cage assembly (IBCA) , the braking layout was reconfigured from a 4+1 friction design to a 3+2 configuration which improved balancing, enhancing customer braking experience and increasing contact area by 11%. This adjustment extends friction liner life and boosts mechanical advantage by 7.5%, significantly improving tractor stability and performance. Additionally, the new design simplifies serviceability, requiring only brake cover removal instead of remove Tyre, Fender, RAC assembly & Brake housing thus reducing service costs and assembly time. The integrated Brake and Bull Cage assembly achieves a 15 kg weight reduction and saves approximately 180 tons of material annually. This innovation contributes to a 51-ton reduction in CO₂ emissions, supporting ESG sustainability commitments. By combining enhanced mechanical efficiency, improved customer value, and environmental benefits, the design sets a new benchmark for tractor transmission systems. The Integrated design is tested in lab and Field condition and implemented successfully. Abbreviations: Brake Housing, Bull Cage housing, RWUP, Virtual simulations, Integrated Brake and Bull Cage assembly (IBCA).