Why Chevrolet’s CORVAIR Rear Wheels Could TUCK UNDER!

The Chevrolet Corvair swing-axle suspension became one of the most controversial engineering stories in American automotive history, largely because of what could happen when the rear wheels moved through extreme camber under hard cornering. On early Corvairs, the combination of a rear-engine layout, strong rear weight bias, and swing-axle geometry could create a jacking effect that pushed the outside rear wheel toward positive camber and, in extreme situations, the infamous tuck-under position. What makes the story more interesting is how Chevrolet tried to manage that behavior. Early cars used an unusual front-to-rear tire-pressure split, and by 1964 Chevrolet added a front anti-roll bar, revised rear spring rates, and a transverse rear leaf spring to better control camber and handling balance. Then, for 1965, Chevrolet replaced the original rear suspension with a far more sophisticated independent design that largely eliminated the geometry responsible for the jacking and extreme camber change. That redesign was already on sale before Ralph Nader’s Unsafe at Any Speed appeared later that year. The Corvair’s reputation ultimately became much simpler than the engineering reality. Later federal testing did not find the early Corvair uniquely dangerous compared with contemporary compacts, and its decline involved far more than one book—Mustang competition, GM’s shift toward the Camaro, development costs, and reputation all played a part. Subscribe to Motor Memento for more forgotten Detroit engineering stories. #MotorMemento #carburetor -- Copyright / Fair Use Disclaimer: This video is created for commentary, criticism, education, and historical discussion. Archival photographs, footage, advertisements, logos, documents, and other third-party materials may be used where necessary to illustrate the subject. Motor Memento does not claim ownership of third-party copyrighted material, and all rights remain with their respective owners. Where applicable, material is used under the principles of fair use outlined in Section 107 of the U.S. Copyright Act. For copyright-related concerns, please contact: mm.copyright@zilopeakstudio.com