8 Speed sequential transmission




This transmission is what I have been building up to over the last few months.
It is an 8 speed sequential and progressive transmission.
I am utilizing my 4 speed sequential transmission MOC-6046 as the basic transmission, and MOC-6054 my 2 speed sequential transmission as a low/high stepper to double the gearing.

I want to thank my son for the idea of using a low/high stepper for more gears.

This results in the following gear ratios:
1 - 1:0.33
2 - 1:0.44
3 - 1:0.60
4 - 1:0.80
5 - 1:1
6 - 1:1.33
7 - 1:1.67
8 - 1:2.22

The gear map is a bit more tricky than my 4 speed. With output at the top and input at the bottom (this would be the 3 16t gears).

For the high/low (top part) High is selected up and low is selected down.
For the 4 speed it is again mapped:


so the gearing to get those ratios is:
1L, 1H, 2L, 2H, 3L, 3H, 4L, and 4H

Now to design a stepper shifter of some sort to run this through the gears. I may choose to add a DNR stage similar to LTG's 42056 Porsche GT3 RS.
Login to hide ads!


Name 8 Speed sequential transmission
Designer jfb9301
Designed 2016
Inventory 304
Theme Technic
Already have some of the parts? Use the Build this MOC page to only show the parts you are missing.
Create an account to change the default filters used.

Waiting for Inventory to load

Use LEGO Digital Designer to open these files and generate step by step building instructions.

Submitted by __I__ March 2, 2019
Submitted by __I__ March 2, 2019