If you need increased torque for towing and crawling or are craving crisper shifting on the racetrack, Performance Truck Products has the truck performance parts to take your powertrain to the next level. Whether youâ€™re in the market for a new transmission, transmission package, or a diesel transmission overhaul kit, youâ€™ll find what you need for your specific vehicle right here. The selection below includes components that reduce wear and tear on your heavy-duty tranny: transmission filters, cooling kits, electronic braking devices, torque converters, and more. If you have questions about any of our custom truck parts below, just contact us. Weâ€™re customer focused and here to help.