Sheepo's Sequential Gearboxes Family

[Sheepo]

Today is the third anniversary of my website!!

And for celebrate it I will show you many information about all my sequential gearboxes until today.

With my latest cars I introduced a new sequential gearbox type, and to avoid problems with how to call this new one, I decide add a new way to call all of them.

Since now the new versions of the sequential gearboxes will be called with ordinal numbers. In this ordinal numbers don't enter other gearboxes types like: dual clutch, planetary or CVT, just normal sequential gearboxes.

1st Generation

This was my first sequential gearbox(I think this was the fisrt Lego sequential gearbox with more than 3 speeds, but I am not sure), I designed it in 2009 to be used in my Bugatti Veyron.

The version used in my Veyron is a 7+R speeds. with a little modifitacions you can get a 4 speeds or a 5+R speeds versions.

The main feature that distinguishes this generation is that it has a speed selector in linear motion, and the distance between speeds are 2 studs.

Correct speeds change ratio: ~70%

In Octuber 2010 I designed a second version with auto-clutch. It worked fine, but I decide not publish it beceause it was too big to be used in any car.

2nd Generation

Before to finish the Veyron, I started to develope a new car(the Porsche), and even before I know what car I will build, I wanted to use again a sequential gearbox, but the Veyron's gearbox wasn't an option because it was too big. In the search of a new smaller gearbox I developed many differents prototypes. And this was one of them.

Finally I decided to use a dual-clutch gearbox to be more accurate to the real Porsche.

The main feature that distinguishes this generation is that it has a speed selector in linear motion, and the distance between speeds is only 1 stud.

I have used this gearbox in 3 of my big MOCs until today, all of them with differents speeds configurations and add-ons.

Type 1 - 2 switches(4 speeeds), without auto-stop, without clutch (Mini Cooper)

Correct speeds change ratio: ~90%

Here the Mini's gearbox. It was the first

You can download the step by step instructions in my website.

Type 2 - 3 switches(5+R speeds), with auto-stop, with auto-clutch (Land-Rover Defender 110)

Correct speeds change ratio: ~80-85%

Here the Lad-Rover drivetrain.

This drivetrain also includes a range gearbox and a 2WD/4WD selector, but the sequential gearbox is a normal 2nd Gen gearbox.

Type 3 - 5 switches(9+R speeds), with auto-stop, with auto-clutch (Peterbilt 379)

Correct speeds change ratio: ~80-85%

Here you can see the whole Peterbilt drivetrain. You can se the main gearbox, the drive motors, the range gearbox and the pneumatic module(compresor, compresor control and brakes control). In total 5 PF XL motors and 3 M.

3rd Generation

The history of this gearbox is very strange. Like the 2nd Gen, this gearbox was initialy developed as a alternative gearbox for the Porsche, but in this case I couldn't make a good system to generetare the auto-stop mechanism, so I leave it in a box of a while...

The main feature that distinguishes this generation is that it has a speed selector in circular motion.

To reduce the size of the few speeds versions I created two types: one for 2 swtiches and another for 3 and 4 switches.

Type 1 - 2 switches only

This type change one speed for each 90º of the selector switch movement.

Correct speeds change ratio: >95%

I will publish some information about it comming soon.

Type 2 - 3 & 4 switches

This type change one speed for each 45º of the selector switch movement.

This gearbox is specialy recomended for 4 switches, because with only 3 switches the saved space compared to the 2nd Gen is not significant, maybe around 5-10%. But with 4 switches the saved space is more than 20%

Version 1 (V1) - Caterham Seven (with auto-stop, with clutch)

Correct speeds change ratio: ~85-90%

This new gearbox is more reliavable than the 2nd generation, but it still have a little problem, and I need to fix it before publish nothing more about it: it can't support high torque. I could avoid this problem in the Caterham adding an external torque converter, but this is not the ideal way to do it.

Here you can see the Caterham Seven drivetrain.

Version 2 (V2) - Ford Mustang Shelby GT500 (with auto-stop, with clutch)

Correct speeds change ratio: ~90-95%

This is a little bit smaller and more reliavable version of the 3rd gen. And with the torque problem fixed.

Here the Mustang GT500 drivetrain.

Future generations

For the future I have some ideas for new gearboxes generations, but they are only ideas... nothing more, and I don't know when I will can have a working prototype.

I hope this long explanation can help you to understand my gearboxes family and the high quantity of models developed along the years.

[Saberwing40k]

Excellent, now could you make instructions for how to make the boxes with the servo switchers? I'd really like to build one for myself, to see how it works.

[dooberfloober]

This is fantastic, I will have to use one of the type 1 2 switches onlies

[DrJB]

Excellent, now could you make instructions for how to make the boxes with the servo switchers? I'd really like to build one for myself, to see how it works.

Agree ... instructions/LXFs would be nice

[Rockbrick]

Increible Sheepo - siempre con boca abierta a tus creaciones.....

amazing work - gearboxes are the brains of all mechanical systems....

I think sheepo has gears inside his head too

[tibivi]

Nice to see the development and history of your gearboxes,

Thanks for sharing and happy anniversary of your site

Tibivi

[Doc_Brown]

Amazing! Like following history. :thumbup:

[KirTech LAB]

Thanks for sharing! Very useful information about clever mechanisms!

[Blakbird]

Excellent, now could you make instructions for how to make the boxes with the servo switchers? I'd really like to build one for myself, to see how it works.

These are already available. The 3rd gen servo switched gearbox is part of the Mustang GT500 for which instructions are available.

I am the proud owner of two of these gearboxes in the form of the Land Rover Defender 110 and the Mustang GT500. The way these two generations function is quite different, so there is much to learn from each. I would be interested to see more about the gearbox in the Veyron, since it also looks quite different than the other two.

[Sheepo]

Excellent, now could you make instructions for how to make the boxes with the servo switchers? I'd really like to build one for myself, to see how it works.

These are already available. The 3rd gen servo switched gearbox is part of the Mustang GT500 for which instructions are available.

Thats is correct, actually you can built any gearbox using the "logic" of the Mustang ones.

I would be interested to see more about the gearbox in the Veyron, since it also looks quite different than the other two.

You can download instructions step by step in PDF (pdf by legolijntje) for that gearbox in my website. ;)

[Saberwing40k]

Thats is correct, actually you can built any gearbox using the "logic" of the Mustang ones.

I meant as it's own thing, not as part of the Mustang instructions. That could help a lot of builders learn how to implement this.