2001 2002 Allison 1000 Transmission Assembly Complete with 6 Bolt Torque Converter 4WD 5 Speed 6 Bolt transfer Case RPO Code: MW7 LB7. Fits 2001 2002 Chevrolet Silverado 2500 3500 GMC Sierra 2500 3500 6.6L LB7 Duramax