PPE HEAVY DUTY DEEP ALUMINUM TRANSMISSION PAN 2001-2016 GM GMC CHEVY ALLISTON TRANSMISSIONS (RAW) - 128051000 Internal and external cooling fins, 6.25 inches from the face of the pan to the tops of the fins  Increases fluid capacity by 4 quarts Decreases trans temperatures up to 40 degrees  Robust side ribs provide added strength  Pan cast from A356-T6 aluminum alloy Large 1 inch drain port  Includes powerful Neodymium magnet-equipped stainless steel drain plug  Drilled and threaded 1/8 and 1/4 inch NPTports for optional temperature probes Compatible with OEM gasket  Easy bolt-on installation and removal makes service quick  Built in Filter Lock keeps filter securely in place Available for: 2001 to current model year Allison Transmissions - Recommended for all stock Allison's. Highly recommended with Stage4 and Stage5 transmission kits.