As it seeks to expand its electric-car production, Tesla Motors may also be attempting to bring more of that process in-house. Carmakers are backed by a complex chain of suppliers, and a recent move ...

CASCADE TOWNSHIP, Mich. – They still can't sell their cars in Michigan, but electric car maker Tesla just purchased manufacturing company and stamping plant Riviera Tool LLC in Cascade Township.

Walking through a toolroom, one is struck by the silence. Unlike an automotive plant with its hum and clang, here the work is quiet, meticulous, almost artistic. Yet these jigs, dies and fixtures ...