Originally posted by NRChopShop
I believe the first car with Hydraulics was a '57 Corvette called the X-Sonic. It used a hand pump originally and eventually used aircraft landing gear setup.
you are correct Ron Aguirre's X sonic was the 1st car to have truely adjustable suspension. He used a hand pump (port-a-power kinda thing) to raise & lower the corvette. That was 1958. If u read the history books (
http://www.lowridermagazine.com/historybook/