– similar to Volkswagen's Autostick. Beginning in 1963, the Dauphine could be had with the three-speed transmission with electro-mechanical control, developed by Jaeger, which functioned as a "fully-automatic" transmission. Renault's "automatic transmission" was controlled by five dash-mounted push-buttons: R-N-D-2-1. A Renault advertisement at the time said "out went the stick, in went the push-buttons – and in stayed the zip, the fun, the economy (35-40 miles a gallon isn't unusual). That's because the only difference between our shift and shiftless cars is this: an electronic control unit on our pushbutton model shifts the gears for you, automatically." Suspension: Front suspension was conventional coil-spring/wishbone layout with an anti-roll bar and rack-and-pinion steering, on a detachable front cross member. Rear suspension was a high-pivot swing axle with concentric coil-spring/telescopic dampers sitting atop the swing tubes which Renault called trumpet casings. With the exception of the trunnion arms in the transaxle housing, there was no fore-aft 'location' of the rear suspension. The pressed engine/transaxle/suspension mounting member was detachable from the main body structure. 61 percent of the Dauphine's weight was carried by the rear wheels. The rear swing axle design, unless ameliorated by any of several options, can allow rear tires to undergo large camber changes during fast cornering, leading to oversteer – a dynamically unstable condition in which a vehicle can lose control and spin. Renault relied on a front anti-roll bar as well as tire pressure differential to eliminate oversteer characteristics – low front and high rear tire pressure — and induce understeer. The tire pressure differential strategy offered the disadvantage that owners and mechanics could inadvertently but easily re-introduce oversteer characteristics by over-inflating the front tires. In the United States, drivers (and General Motors) experienced virtually the same issues with the Chevrolet Corvair. In 1960 Renault revised the suspension with the addition of extra rubber springs up front and auxiliary air spring units (mounted inboard of the conventional coils) at the rear – marketing the system as Aerostable – and giving the rear wheels a small degree of negative camber and increased cornering grip. Engine configuration: Speaking about the Dauphine's rear-engine, rear-wheel-drive layout, Renault's Fernand Picard said in a paper he delivered in 1957 that the car was part of a rear-engine trend led by Volkswagen, Fiat and Renault whereby the rear drive/rear engine configuration had increased from 2.6 percent of continental western Europe's car production in 1946 to 26.6