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The BD Diesel Allison 1000 transmission kit for 2001–2004 Chevy LB7 4WD upgrades clutch counts, friction materials and fluid systems for greater durability. The aluminum deep pan adds 3.5 qt oil capacity and heat‑dissipating fins while revised oil circuits, new trim valves and a converter lockup valve improve line pressure and shift crispness. Increased clutches and GPZ frictions help the transmission handle substantially more torque.
BD Diesel Transmission - 2001-2004 Chev LB7 Allison 1000 4wd
