LEGO gearbox – seven speed plus reverse

We know LEGO is a very versatile medium to build with but this is beyond what we considered possible. Seven speeds and a reverse gear were built into the gearbox for this LEGO vehicle. It’s not completely an original design, but adds to the five-speed design found in a ten-year-old LEGO set. See it demonstrated in the video after the break. The design uses a sequential gearbox; shifting is accomplished by clicking the stick up or down depending on how you want to shift. If you’ve got enough parts on hand you can build this using the assembly photos that [Sheepo] posted.

Can’t get enough of the gears? Check out this model of a double clutch transmission.

[Thanks James]


  1. darkore says:

    This is THE definition of awesome.

  2. andrew says:

    That’s awesome. It seems like he has to stop throttle input before changing gears. What’s up with that?

  3. brit says:

    Presumably the let off of throttle is for the same reason that cars have a clutch, which would prevent gears from improperly engaging.

  4. Moggie100 says:

    I have the kit they refer to on their site (the red supercar kit)… Must rebuilt it at some point!

    Urge to Lego… rising…

  5. risu says:

    Now THIS is pure art. Amazing.

  6. rschlagle says:

    What kit is this? Must get it.

  7. anon says:


  8. Kimmo says:

    Suddenly the HaD crowd approves Lego posts again ;)

  9. madmax2012 says:

    Great work :)

  10. FDP says:

    I will take Lego before Arduino any day.

  11. Teebo says:

    I was floored when I saw this on autoblog. I’ve brainstormed different tranny types in Lego for years, but never got to his level of construction.

    The first lego tranny in a Technic set was a 3-speed direct(no spring-back center shifter) linear shift slush box. No reverse.

  12. rallen71366 says:

    Hey, anyone thought of using an Arduino to control the input motor, and solenoids for gear shifting? *ducks and runs while laughing*

  13. djrussell says:

    how about the 8880 4-spd?

  14. McSquid says:

    this is what win is made of

  15. Wayne says:

    And yet it’s still sturdier than a Chrysler transmission.

  16. Cynyr says:

    The let off was just for that video, this one shows him shifting with the throttle “pressed”

  17. Luckless says:

    Dear God, my life is complete. Take me now.

  18. Gert says:

    Holy Fucking Shit!
    Why do i want this now?
    I don’t need it but i want it.
    (holds napkin to foaming mouth.

  19. ??? says:

    The only difference I see is fwd and reverse. A ‘normal’ manual transmission slides different ratio gears onto the main gear/shaft. I didn’t see anything like that happening.

  20. Diddle says:

    Although I know very little about Arduinos and stuff like that, Lego I understand completely… but engineering a 7 speed gearbox still blows my mind. Well done!

  21. Colin says:

    This is absolutely amazing.

  22. BigBubbaX says:

    The gear system is WIN,
    adding all the other stuff earns the prefix EPIC-.

  23. yanges says:

    i really like your Lego Veyron!!

    Very nice work!!

  24. sM10sM20 says:

    This is without a doubt the most amazing lego project ever. EVER. Also arguably the most amazing model car project ever created.

    Just wow.

  25. sM10sM20 says:

    Also this page needs a donation button, win of this caliber must be rewarded.

  26. Conceptual says:

    So, this must be the magical 7 speed gearbox that USF1 fussed so much about!

  27. nate says:

    how the heck are parts so nicely placed together and still there is space for extras like popping

  28. ForSquirel says:

    It’s things like these that bring me to this site hoping that one day I might learn something… Just incredible. And to think all I had was some Capsellas(sp) to keep me occupied..

  29. D- says:

    Constant mesh gears and dog clutches, a nice model, but not really nothing new. Performance under a load would be impressive, will the dog clutches cam out or not?

  30. Dielectric says:

    Geez, when did Lego get dogs and shift forks? When I built a trans, it was old-skool sliding gear stuff.

    I might have to paw through the new Technic catalog for some new stuff, I’ve got a model of a Ducati desmo bevel head that isn’t working right.

  31. markii says:

    don’t like Lego’s but this stuff is great!

  32. pwsome says:

    The steering wheel’s on the wrong side…

  33. Nitori says:

    This has to be one of the coolest things I seen made of legos.
    I didn’t know one could make a transmission out of them I wonder how he did the sliding gears and dog clutches on this.

  34. Fiach Antaw says:

    Oh wow, I have that kit! I remember trying to hook a Lego RCX to it when I was younger, but I can’t remember if I ever got it working; maybe I’ll take another look…

  35. strider_mt2k says:

    I would also like to see this doing some useful work of some kind.

    I wonder how and where the wear would show?
    That is to say that observing it would be interesting.

    Maintaining it…perhaps too interesting. ;)

  36. Ivan says:

    What about “LEGO Hacks” tag?

  37. kristian says:

    @Ivan: seconded!

  38. Moggie100 says:

    Incidentally, the ‘sliding gear’ type gearboxes people refer to in comments are known (afaik) as “crash gearboxes” due to the way the gears come together.

    I always thought that was an apt name ^.^

  39. @strider_mt2k: If you check out the website, you’ll see that this was, actually, build for use in a larger functional Lego RC model of a Buggatti Veyron.

  40. Orv says:

    @Moggie100: Yes, although most “crash boxes” in real cars are actually still constant mesh; they just use dogs instead of synchros. I’m sure sliding-gear automotive transmissions exist, but I’m not aware of any examples — other than reverse gear, which uses a sliding idler gear in most manual transmission designs.

  41. KrittMasta says:

    Win! .. I want one! … Love it!

  42. pov says:

    That bring up fond memories of the 4 speed gearbox with clutch that me and my dad build some 25 years ago :)

  43. kevin says:

    this is a really cool car, but does it actually drive in any gear other than 1st and reverse? ive seen a few videos of it but ive never seen it drive faster than 1st gear and ive never seen it shift while moving, other than reverse…

  44. gene 4 says:

    that is awesome

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s


Get every new post delivered to your Inbox.

Join 96,441 other followers