Overview: What the “E” Stands For
The “E” on gear selectors of late-1970s through mid-1980s vehicles stands for Economy. Introduced by domestic and Japanese automakers following the 1970s oil crises, it served as a mechanical predecessor to modern electronic drive modes.
Mechanical Operation vs. Modern Eco Mode
| Feature | Vintage “E” (Economy) Gear Position | Modern “Eco Mode” Dashboard Setting |
| Control System | Hydraulic / Mechanical valve body adjustment | Electronic Control Unit (ECU) software |
| Shift Strategy | Upshifts at lower RPMs; engages overdrive earlier | Adjusts shift logic, throttle response, & HVAC load |
| Driving Feel | Reduced acceleration responsiveness | Smoother, less sensitive throttle pedal feel |
| Activation | Physical gear shift lever selection | Dashboard button, touchscreen, or dial selector |
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