Allison 1000 Automatic Transmission Power Flow

Weber State University (WSU) Automotive Technology Department Transmission Lab. Allison 1000 MW7 6Speed and M74 5Speed 6Speed Automatic Transmission Power flow. The Allison 1000 is built by Allison Transmissions, a General Motors owned company. This tansmission is typically used in 2001 and newer Chevrolet Silverado and GMC Sierra HeavyDuty C and K series pickup trucks with the Isuzu 6. 6L Duramax engine. This transmission uses a simple planetary gear set to drive a Simpson planetary gear set (common sun gears). The following summarizes the changes to the Allison 1000 over the years: (2010 Uprate) MW7 Strengthened to handle the higher torque capability of the 2011 model year Duramax LGH and LML engines. 4th Generation MW7 Added 6th gear and other software refinements in 2006. Used with the 2006 2010 LBZ, LLY, and LMM Duramax engines. 3rd Generation M74 Added Solenoid G to the valve body to modulate main pressure at an idle to quiet the oil pump and reduce engine br, br,