Original equipment manufacturer's (OEM's) core competence is satisfying the needs of the end user. Supplier's core competence is satisfying OEM's and optimizing their area of expertise. Combining forces on projects creates synergies to produce Drive Line System's technical and cost results that are unattainable independently by either. State of the art examples include integration of multiple machine function and electronics to create interactive systems and redesign existing power trains to optimize functionality and to downsize the system. Close cooperation and excellent communication between the OEM and supplier is essential for project success.