2001-2020 Deep Transmission Pan Allison 1000 And 2000 Series Raw (128051000)Description Simply stated, more is always better when it comes to transmission fluid. Higher volumes of fluid take longer to heat up allowing for more stable transmission temperatures which help to extend transmission life. >PPEs Heavy Duty Deep Allison Transmission Pans hold an extra 4 quarts of fluid and are cast from high quality aluminum for strength and optimal heat dissipation. Tall 1 inch internal and 3 4 inch external cooling fins reduce