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Sequential 7+R speeds gearbox instructions
Instruction to built a sequential 7+R speeds gearbox.
About this creation
Due to the large number of requests concerning my last MOC (Bugatti Veyron: http://www.mocpages.com/moc.php/172197) mainly with reference to the gear box, I have taken some time create some simple instructions. Iím not sure how to best go about this so Iíll explain them step by step which I believe will be enough.

To start of Iíd like to say that what made me design this gear box was the fact that since the 8448 there hasnít really been any development as far as gear boxes are concerned. AS a matter of fact there is a large number of great MOCs that in the end mostly use the same well-known, rather clumsy (although very reliable) manual gear box. Because of its reliability I decided to use this very gear box as the base for my design.

The gearbox itself is a modified version of the one you can find in the 8448, but built studdless and with two extra speeds (6th y 7th)





But in order to make it work one more change is necessary: all the Axle Connector Ridged (6538/a/b) mist be substituted by Axle Connector Smooth (6538c)


Important note!!!
The Axle Connector Smooth has two rounded sides and two flat sides. It is very important that the internal pins of the Driving Ring (6539) coincide with the flat faces of the axle connector



Additionally the structure that contains the Changeover Catches (6641) is built





Both parts are joined taking care to make them mesh correctly



After that the structure that contains the rockers is built



The rockers are placed over the handles of the Changeover Catches





The rail that will accommodate the gear selector must be properly secured





The rubber used in the gear selector must be very tense









It is put in place sliding it in from one of the sides.
Once it is in place, the gears can already be changed sequentially, sliding the gear selector forwards and backwards, meshing one gear and unmeshing another

Reverse

Speed 1

Speed 2

Speed 3

Speed 4

Speed 5

Speed 6

Speed 7


If the Changeover Catches donít move o donít move smoothly too much friction has been introduced in the construction. Go over the moving parts of the gear box one by one and make sure they have the least possible friction.

What remains it is the part needed to move the selector little by little. This can be done in several ways. The system I used is bulky but reliable and relatively simple.



















The long liftarm you can see in the last photo is what will later become the gear lever.

Add the supports for the selector



Finally the two self-centring devices (top and bottom)























The rubbers should be neither very tight nor very loose. If the teeth on the device donít grip or let go the selector they are either too strong or too weak.

Thatís it!!!



The gear box should now work correctly. By pulling the lever away from the gear box you gear up and by pulling it the other way you gear down.

A video with gearbox working:


And instructions step by step for MLcad(with photos) by Jurgen Krooshoop (http://www.mocpages.com/home.php/21811)
here:
http://www.megaupload.com/?d=5PHY5HVV

Also you can find more information in my website:

sheepo.es

If you have any comments or questions you can write to sheepo_86@yahoo.es

Thanks for reading!!!



Comments

 I made it 
  May 23, 2013
Quoting Timothy Dillman Just 1 question, is your 5+R basically the same as this just without the last 2 gears, or is it different enough that I should wait for instructions to come for it?
This gearbox is the first generation of my gearboxes. The Defender, the Mini and the Peterbiit uses 2nd gen gearbox, and the Caterham uses a 3rd gen. All generations are very different between them.
 I like it 
  May 23, 2013
Just 1 question, is your 5+R basically the same as this just without the last 2 gears, or is it different enough that I should wait for instructions to come for it?
 I made it 
  July 3, 2012
Quoting Mingquan Lu Hello, Mr.Sheepo, I am quite curious on how to modify this creation into a 6 speed sequential in order to moc my 8145, can you give me some advice on the necessary modification? Thanks
Very easy, you only need don't put the last 16t clutch gear(7th), and the gearbox works fine with only R+6 speeds
 I like it 
  July 2, 2012
Hello, Mr.Sheepo, I am quite curious on how to modify this creation into a 6 speed sequential in order to moc my 8145, can you give me some advice on the necessary modification? Thanks
 I like it 
  April 13, 2011
This blows my mind...easily the best gearbox I've ever seen in Lego. I don't even know what else to say...fantastic!
 I like it 
  January 25, 2011
wonderfull...I, is possible to have a list of components needed? Hi Pietro
 I made it 
  October 1, 2010
Quoting Merlijn Wissink I have made PDF instructions (not the best in the world :-)) but better than de Mlcad model. I can send it you if you want. Then you can check if it's good and then you can put it anywhere where people can download it. (It's only an idea) (my English is not very good, but good enough :-))
Sorry for not response before :(. Yes you can send it to me and I check it.
 I like it 
  August 9, 2010
I have made PDF instructions (not the best in the world :-)) but better than de Mlcad model. I can send it you if you want. Then you can check if it's good and then you can put it anywhere where people can download it. (It's only an idea) (my English is not very good, but good enough :-))
 I like it 
  June 22, 2010
sorry for double post. but finally i've uploaded it. please come by and have a look at it.
 I like it 
  June 22, 2010
ok ill upload it today
 I made it 
  June 12, 2010
Quoting the ant ok ive dled the instructions and i tried to make it in ldd. i think i succeded. may i upload it on mocpages if i say its "Sheepo's original construction just put in ldd by me"?
Ok, but in the link you can find it in LDraw. If you want make it in LDD no problem.
 I like it 
  June 12, 2010
ok ive dled the instructions and i tried to make it in ldd. i think i succeded. may i upload it on mocpages if i say its "Sheepo's original construction just put in ldd by me"?
 I made it 
  June 12, 2010
Quoting the ant absolutely.love.it. i know this is a rather big request but could you please upload a image with all the parts needed? it would help a lot but its ok if you dont want/can.
If you want a make it, the best way its that you donwload the instructions(by Jurgen), the link is in the end of the post.
 I like it 
  June 11, 2010
absolutely.love.it. i know this is a rather big request but could you please upload a image with all the parts needed? it would help a lot but its ok if you dont want/can.
 I like it 
  May 28, 2010
Massive!
  April 21, 2010
is there a neutral position in the sequence of gears?
 I like it 
  April 9, 2010
Wow!!
 I like it 
  January 29, 2010
That is amazing!! I really didn't expect it to work so well. The best Lego gearbox I've ever seen, but unfortunately it's massive, so I guess it's limited to XXL models only. Superb design- 5 stars
 I like it 
  January 23, 2010
Very many thanx for sharing this with us!! I will try this ASAP and if I get it working, it'll be a wish come true 8-) .
 I like it 
  January 23, 2010
thanx, you're great! I'm going to try this tomorrow!
 
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LEGO models my own creation MOCpages toys shop Sequential 7+R speeds gearbox instructions


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