Build & Test Lego Gearboxes: 2, 4, 6, 8, 12-speed

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Each gearbox is built from scratch and then tested for speed and torque. Flat layouts only (gears are on the same plane) for better visualization. Enjoy!

00:00 2-speed
01:09 2-speed with driving ring
02:31 4-speed
04:02 6-speed
05:58 8-speed with range change
08:29 12-speed with splitter
11:48 all gearboxes side-by-side
12:09 graphs

Key Lego parts used in this video:
Driving Ring 2L [6539]
Axle Connector 2L [6538c]
Gear 16 Tooth with Clutch, Smooth [6542b]
Changeover Catch [6641]
Changeover Plate [6631]
Driving Ring Extension [35186]

Check out a great resource on Lego gearboxes: