Gearboxes are what make Technic feel like real engineering. Here's a simple guide to the types you'll find in sets.
Sequential gearboxes
Used in supercars like the Lamborghini Sián 42115 and Bugatti Chiron 42083. Paddle shifters rotate a selector drum, which engages one gear at a time, exactly like a real sequential transmission.
Distribution gearboxes
Found in machines like the Rough Terrain Crane 42082 and Airbus H175 42145. A single motor drives several functions, and a selector chooses which one receives power.
Differentials
Differentials let the left and right wheels turn at different speeds in corners. Off-roaders like the Land Rover Defender 42110 use several of them for permanent four-wheel drive.
Clutch gears
The white "clutch gear" slips when too much force is applied, protecting functions like winches and steering from damage.
Troubleshooting
- Gears skipping? Check that the gearbox frame isn't flexing.
- Gear won't engage? Look for a selector ring placed upside down.
- Everything stiff? A bush may be pressed too tightly against a gear.
Shop the sets in this article
- 42115 Lamborghini Sián FKP 37 — Like New · Imperfect Box · Used
- 42083 Bugatti Chiron — Like New · Used
- 42082 Rough Terrain Crane — Used
- 42145 Airbus H175 Rescue Helicopter — Like New · Imperfect Box
- 42110 Land Rover Defender — Like New · Used
Every listing states its actual condition and what is included. See our condition guide.
FAQ
What is a sequential gearbox in LEGO Technic?
A gearbox where you shift one gear at a time with a lever or paddles, as in the Technic supercars.
Why does my LEGO Technic gearbox skip?
Usually because the frame flexes or a gear is slightly misaligned; reinforce the frame and check each axle.
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