There are three varieties. Hydraulic motors are labeled into three types: gear, Steroid powder piston, and vane. Gear motors are small and efficient, providing steady service at rated power levels. They use one or more beveled gears to drive the motor shaft. These gears may be metal (steel or iron) or plastic. Steel-gear motors are heavier than plastic-gear motors but extra durable. Plastic-gear motors are lighter and less bulky than their metallic counterparts.

Notable among the many latter was the 2003 debut of GM’s Magnetic Journey Management shock absorbers for the sporty STS model’s Street-Sensing Suspension. An innovation shared with that 12 months’s 50th Anniversary Chevrolet Corvette, these dampers have been full of a new «magnetorheological» fluid that might nearly instantly change viscosity — and thus journey firmness — when acted on by an electric present. MRC was highly efficient, however did nothing to change the much less-than-electric image of the STS, let alone that of the much less-sporting SLS model.

Corvair’s demise after 1969 left Nova as Chevy’s only compact. The 1970 edition was mildly face-lifted, however noticed no substantive change. That year’s Chevelle, nonetheless on the cut up-wheel-base 1968 A-physique platform, was restyled to look extra like full-dimension Chevys, gaining a divided grille, bulges around each wheel opening, and a more-rounded, large look.