How to Double Clutch Big Rigs

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    • 1). Depress the clutch pedal and push the gear shift lever into neutral. This allows the engine to run freely for a moment and to match the speed at which the drive shaft is turning.

    • 2). Release the clutch pedal and glance at the tachometer (it's usually located next to the speedometer and measures the engine speed in revolutions per minute or RPM). Some tachs have markings to indicate the suggested RPM for shifting into each gear. Remain in neutral until the engine speed reaches the suggested RPM. Each engine is different, and each has specific RPM requirements.

    • 3). Depress the clutch again and push the shift lever into the next gear. The transmission should shift easily with no crunch or clunk sounds. If it doesn't shift easily, the engine speed and shaft speeds are not matching. Depress the clutch again and either let the engine speed slow or increase the engine speed by gently tapping the accelerator until the truck goes into the next gear smoothly.

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