8.9L Cummins with an Allison 3500MH 6 speed transmission. We just replaced all 6 house batteries last spring. This also has an exhause brake as well as an 8,000 Onan diesel generator that runs off the main diesel tank. We purchased an Air Force 1 air braking system that we were going to install to tow a TOAD, but since we have decided to sell the coach it has not been installed. We also have a 10K brand new tow bar and mounting brackets for a 2021 Jeep and a 2019 Dodge Ram as we were going to set up both to be towed, but those are also still in the boxes. These items can be worked into the deal if the potential buyer is interested.