Simplest automatic LEGO transmission in the world? Really functional. Principle explained.

The video shows probably the simplest automatic transmission built from LEGO bricks. It is two speed transmission and uses a friction clutch. Shifting is smooth and the transmission is also used in the LEGO car, as shown in the video. It is therefore really applicable. A GoPro camera mounted directly on the car was also used for recording to see the change of gears while driving in slow motion video. I designed this type of transmission by myself and I have never seen any such simple solution. If any of you know or have seen a similar transmission please let me know. Extra simple LEGO gadgets are my hobby. I hope you enjoy the video.

[@generalgod4326]

Finally a gearbox that doesn't need springs or elastic bands

[@edrumsense]

Toyota eCVT principle?

[@Woshizzle]

Thanks for the detailed breakdown. One question, since the slipping gear is always slipping, do you sacrifice a lot of engine power?

[@catgirldoll]

I see you've experimented with big trends in the past, but please stick with lego engineering videos! If they are as good as this, I'm sure your channel can grow.

[@firemundy4528]

This makes me want to take engineering in college. But I already know how depressed engineering students are.

[@peterbondy]

I’m simply amazed at what can be built using LEGO and also so impressed with the way an engineer’s mind works! This is very cool.

[@sfrerku]

So, it's more like a clutch slipping than a gearbox, since a gearbox is supposed to increase torque wile on lower gears, not the opposite like here where power is getting lost at lower speeds...still, interesting solution to avoid stalling the motor

[@t_munz]

Very cool idea. I just wonder if that is kind of a magical illusion that looks right, but it works only because the car would also successfully climb the hill also without the transmission. Isn't there simply the extra force coming from the higher gear ratio "destroyed" by the friction in the clutch?

[@jakemustian99]

Theoretically, could you stack 2 of these for a wider range of speed? I'm assuming it would become slower but stronger

[@SaperPl1]

This looks really, really cool, but I wonder if it actually works as a proper transmission (exchanging speed for torque). You should do a test showing a scenario when the same motor that has same gearing as your fast speed can't climb a slope, and then show that your gearbox can climb it. I've seen a lot of various gearbox ideas that do indeed change the speed, but do so by wasting energy in various ways. In your configuration it seems you may be just wasting energy on white clutch gear slipping.

[@Flare-nd]

2:28

[@serafimhacker]

i am speechless about this auto-gearbox its... unbelivable simple

[@herrnase4340]

GREAT explaining. I really learned something today. Never thought this would interest me, but it was soo captivating!

[@whatelseison8970]

This is way better than the idea I came up with as a kid. Mine shifted from 3:1 up to 1:3 via a centrifugal governor and just ground the gears until it built up the speed to shift. Seems to me I messed around with differentials too but that first one stick in my mind because I remember that once it got going it could actually outrun me. Good times.

[@Tinker_Nerd]

I imagine there's a range where the resisting torque on the output is high enough to cause the clutch to slip, but low enough that it allows the clutch gear to still rotate, effectively giving a range of variance in the output ratios. I think that this may actually be a CVT

[@user-kn9ot8dq4g]

Finally a video as simple and educational as the old chevrolet videos

[@kooky45]

Excellent, best video explaining a Lego auto transmission.

[@sumeetdubas2411]

That amazing explanation of transmission system

[@DanielA-gw6kw]

Freaking awesome 😲👌🏼

[@MackBricks]

This is fantastic! Great video!