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4-speed manual compact gearbox

December 28th, 2008 Leave a comment Go to comments

Very small 4-speed manual gearbox with large gear ratio difference between particular gears. Can be built into bricks or liftarms, with 8880 gear lever or a regular changeover transmission catch.

This idea is based on a concept by Erik Leppen, who invented the setup of gears. I have rearranged them to make versions for the 8880 gear lever as well as for a regular changeover transmission catch, and I have later expanded this design to a larger number of gears.

On the photos below you will find diagrams of gear that transmit drive at each gear selected. There are also photos of a version built into liftarms and using a regular changeover transmission catch (which requires a slightly different setup of gears). Finally, there is a size comparison between this gearbox and the 8880 set’s original 4-speed gearbox.


1.png 8880gear1.jpg 8880gear2.jpg 8880gear3.jpg 8880gear4.jpg 8880minigearbox1.jpg 8880minigearbox2.jpg 8880minigearbox3.jpg 8880minigearbox4.jpg 8880minigearbox5.jpg 8880minigearbox6.jpg 8880minigearbox7.jpg liftarms1.jpg liftarms2.jpg liftarms3.jpg liftarms4.jpg size_comparison.jpg
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  1. unknown
    June 16th, 2012 at 15:19 | #1

    great idea

  2. Sariel
    March 30th, 2011 at 08:27 | #2


  3. Kshomiv
    March 30th, 2011 at 02:42 | #3

    Where did you get that top piece with the H pattern for the gear shifter lever?

  4. simon
    September 30th, 2010 at 21:07 | #4

    tis is tge best gearbox i ever seen!!

  5. Sariel
    July 13th, 2010 at 12:27 | #5

    Only if you use sufficient gear reduction between the gearbox and the wheels.

  6. darksheep
    July 13th, 2010 at 12:17 | #6

    can this be user with high torqu like truck and trial trucks

  7. Sariel
    November 15th, 2009 at 00:24 | #7

    Sorry but I don’t have a specific list, only photos.

  8. Noah
    November 14th, 2009 at 19:06 | #8

    For the 4 speed manual compact gearbox, what is the breakdown of parts needed?

  9. Sariel
    August 9th, 2009 at 13:02 | #9

    I don’t think so.

  10. Sam
    August 9th, 2009 at 11:31 | #10

    Awww.. I don’t have the grey plate and it looks like an awesome gearbox. Is there something that could be used as a substitute?

  11. Browning
    May 6th, 2009 at 00:44 | #11

    you can find them in the old technic crane set for extending the boom@Arnau

  12. Sariel
    March 15th, 2009 at 20:52 | #12

    You mean gray plates? They come from the 8448 set.

  13. Arnau
    March 15th, 2009 at 20:29 | #13

    I know that you have the white plate for the gearbox from 8880, but in which set did you get those grey pieces for the gearbox?

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