BD Duramax Allison Trans & Converter Package Stage 5 - Chevy 2007-2010 LMM 4wdWhen you purchase a BD transmission and torque converter package, you are getting a matched set that has been dyno tested together for ultimate performance, and reliability. Every transmission comes with BD's own Heavy Duty pan that adds extra fluid capacity. For towing, street or track, when it comes to a dependable transmission that will stand up to your diesel's power and torque demands, the clear choice is BD.