If you have ever driven a manual transmission car, you might have heard about the term double clutching. So what is this sorcery and how does it effects your driving style? Do you need it on every car? Here are the answers!
Double clutching is useful for transmissions which either don’t have synchronizers or have their synchronizers worn out. Mind you; a synchronizer is a part in your transmission that allows the gears and collar to get in “sync” in terms of speeds, which is necessary to avoid damage and a smooth gear transition.
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Double clutching can be done by pressing the clutch pedal while shifting to neutral to match engine speed, whether increase it or decrease it, with the intended gear and vehicle speed. For example, if shifting from 4th to 3rd gear, the driver would press the clutch, put the car in neutral and apply brakes to reduce the engine speed to match the gear speed. Then he’ll press the clutch again (double clutching) and then shift to the 3rd gear. And the process will be the same when shifting up with the exception of using the accelerator instead of the brake when the car is in neutral.
Of course, all this was necessary only if your car’s synchronizer has gone to the dogs or you use an old enough model that doesn’t have a synchronizer.
Watch the awesome video by Engineering Explained to learn all things Double Clutching!