Embodiments of the invention provide an electric machine module comprising a module housing. In some embodiments, the module housing can include a sleeve member and at least one end cap. Also, an inner wall of the module housing can at least partially define a machine cavity. In some embodiments a coolant jacket can be positioned within a portion of the sleeve member. Further, in some embodiments, at least one partition can be positioned substantially within the coolant jacket. The partition can be dimensioned to at least partially seal a first region of the coolant jacket from a second region of the cooling jacket.