BD Diesel Transmission - 2001-2004 Chev LB7 Allison 1000 4wdIncrease the durability of your drivetrain; Revised oil circuits; Handles up to 300% more power and torque than the stock transmission; Extra clutches and stronger internals; BD rigid aluminum heavy duty transmission pan; Pan adds 3. 5qt extra oil capacity; Pan reduces case flex; Pan reduces internal oil leakage; Pan heat dissipating fins keep temperature down; Pan magnetic drain plug; New convertor lock up valve to boost lock up pressures; Updated