Ninja Mega Kitchen System BL773CO 30 Blender Base for Parts Only- WORKS

Ninja Mega Kitchen System BL773CO 30 Blender Base for Parts Only- WORKS This is a working base for the Ninja Mega Kitchen System, Model # BL773CO 30 but it has an issue so please read for information. When running for a long time, the blender will heat up slightly, which I feel is normal for an older model. However, when processing food in the blender or food processor containers, it seems like it's working harder than it needs to. It also leaves a black residue in the bottoms of the part attached to the base. To be clear, the black residue never touches anything with food, it is only on the black bottom part where the gears of the two pieces meet and turn.