Peterbilt 357/378 Transmission Coolers: Efficiently Manage Your Truck's Cooling Needs Maximize the performance and longevity of your Peterbilt 357 or 378 semi-truck with our selection of high-quality transmission coolers. Designed to effectively regulate temperatures and prevent overheating, these coolers are essential components for maintaining optimal transmission function. Featuring a range of sizes and configurations to suit your specific model, our transmission coolers offer durable construction and reliable cooling capabilities to keep your Peterbilt running at its best. Whether you need a direct replacement or an upgraded cooling solution, our Peterbilt 357/378 transmission coolers have you covered. Stay on the road longer with the added peace of mind of efficient temperature control.