The BD Diesel LockOut Overdrive Disable (1031350) is a performance-enhancing accessory specifically designed for the 2005 Dodge Ram trucks equipped with the Cummins 5.9L engine. This innovative module allows drivers to manually disable the overdrive function of the transmission, providing greater control during towing, climbing, or engine braking situations. By locking out overdrive, the LockOut device helps prevent unnecessary shifting, reduces transmission heat, and improves overall drivability under load. Easy to install with plug-and-play functionality, it integrates seamlessly with factory systems without requiring any permanent modifications. Ideal for heavy-duty applications, the BD Diesel LockOut Overdrive Disable is a practical upgrade for Cummins owners seeking enhanced transmission control and durability.