Not sure why, but every couple of years another article tries to canonize and saintify the Gen 1 corvair. I own a 66 red monza conv, 4 speed with the updated rear independent suspension that allowed vertical movement of the rear wheels by adding a second U joint at the wheel hub. No different than the rear suspension you see today on almost all RWD vehicles.
GM screwed up on the gen 1 corvair. The engineers - God bless them - were short sighted at best and basically copied without thinking or analyzing, the rear suspension design used then on the VW Beetle / porsche 356 or a Skoda or a Renault 10 etc…
This dangerous design was done in 1921 by Hans Ledwinka, a Czech engineer who developed the Tatra 11, launched in 1923, it featured a rigid backbone tube with swinging semi-axles at the rear giving semi independent suspension. But under hard maneuvers, it allowed the rear wheel to tuck itself under the car and lift the backend up, raising the center of the gravity and narrowing the momentum arm. Both movements are the worst that a suspension can exhibit in a vehicle facing oversteer.
So what did GM do? First, they tried to dis-credit Ralph Nader which backfired on them in a horrible way and led the GM president, James Roche to apologize to the senate committee and to Ralph Nader.
In hind sight, this was the best thing that could have happened that day to the automotive industry and consumer protection, because it drove multiple national acts such as Freedom of Information Act, the Consumer Product Safety Act, the Whistleblower Protection Act, and the National Traffic and Motor Vehicle Safety Act.
Going back to the flawed rear suspension design on the Gen 1 corvair, GM in the Gen 2 corvair corrected that flawed design of swinging semi-axles and offered a fully independent rear suspension. This corrected the problem of backend lift and reduced oversteer and more importantly, it confirmed the flawed design in Gen 1 corvair.
Net: Why can’t we all admit and face the facts and be thankful that someone like Ralph Nader stood up to Goliath. Without him, we would probably still be driving vehicles with a solid shaft steering column that skewered our lungs in a head on collision and a metal dashboard that cracked our skulls like raw eggs and semi swinging rear axles that couldn’t handle a 0.5G on a skid pad without flipping a car over.