Manual vs Automatic Gear: What Really Happens When You Change Gear

Every gear in your gearbox is already spinning, so what does changing gear actually change? And how does an automatic do it with no clutch pedal and no gears sliding into place? We open up both gearboxes in 3D and watch every part move. • Why a car needs gears at all: speed traded for turning force (torque) • The clutch: flywheel, disc, pressure plate and spring, pedal up vs pedal down • Inside a manual: constant-mesh gears, dog collars, the gear lever and the synchroniser that stops the grind • Inside an automatic: the torque converter, planetary gear sets and the oil-driven clutch packs that hold them • Side by side: why an automatic's push to the wheels never drops during a shift 0:00 Introduction 0:30 Torque and Gear Ratios 1:44 The Clutch 3:02 Constant Mesh 3:51 Dog Collars and the Gear Lever 4:39 Synchromesh 5:24 Reverse 5:54 A Full Gear Change 6:22 Inside an Automatic 6:41 The Torque Converter 7:32 Planetary Gears 8:23 Clutch Packs 9:25 Manual vs Automatic 9:49 Summary New here? This channel explains physics with animation, one idea at a time, from the question to the formula. Subscribe so you don't miss the next one. #physics #gearbox #automatictransmission