There are three sorts. Hydraulic motors are categorised into three sorts: gear, piston, and vane. Gear motors are small and efficient, offering steady service at rated power ranges. They use a number of beveled gears to drive the motor shaft. These gears can be steel (steel or iron) or plastic. Metallic-gear motors are heavier than plastic-gear motors but extra durable. Plastic-gear motors are lighter and fewer bulky than their steel counterparts.

Notable among the many latter was the 2003 debut of GM’s Magnetic Journey Management shock absorbers for the sporty STS model’s Highway-Sensing Suspension. An innovation shared with that year’s 50th Anniversary Chevrolet Corvette, these dampers have been crammed with a brand new «magnetorheological» fluid that might nearly immediately change viscosity — and thus experience firmness — when acted on by an electric present. MRC was highly efficient, but did nothing to change the much less-than-electric image of the STS, let alone that of the much less-sporting SLS mannequin.

Corvair’s demise after 1969 left Nova as Chevy’s solely compact. The 1970 version was mildly face-lifted, but saw no substantive change. That 12 months’s Chevelle, nonetheless on the break up-wheel-base 1968 A-body platform, was restyled to look extra like full-size Chevys, gaining a divided grille, bulges round each wheel opening, and CharLynn a extra-rounded, large look.