Excessive heat is the primary cause of transmission failures, leading to issues like clutch pack slippage, rough shifting, and fluid degradation. Prolonged overheating can halve your transmission's lifespan. The PPE Duramax w/ Allison bar and plate transmission cooler ensures optimal cooling, prolonging your transmission's health and life. This all-aluminum cooler boasts a colossal 209 cubic-inch core, 106% larger than the stock cooler. Its 18% larger frontal area enhances airflow, promoting heat dissipation. Dense, louvered external fins maximize heat transfer to ambient air, achieving a temperature drop of up to 40F, even under strenuous conditions. The PPE cooler's robust bar and plate construction, an upgrade over the factory stacked plate design, delivers superior cooling mass and flow capacity. Its all-aluminum construction also offers exceptional pressure resistance and durability, making it perfect for high-performance applications.