6 Speed Allison Automatic Transmission / Gearbox

Description

This model is base on the Allison 1000 automatic transmission. Is not an exact replica but the basic design and functionality are the same. The most significant difference from the real transmission is the C1 and C2 clutches that I design to work with 3D printed parts and solenoids.

Gear ratios:

1st: 3.20

2nd: 1.86

3rd: 1.43

4th: 1 

5th: 0.70 

6th: 0.60

R: 4.41

Assembly video: https://www.youtube.com/watch?v=vvhICaIRjOY

I made the lower part of the case quite big so there's room to put solenoids to engage all the clutches and even a parking pawl to control them with switches or even change gears automatically with something like Arduino.

The selector 3D model is here: http://www.thingiverse.com/thi...

For more information about how to make the electrical part to control the solenoids, go to my project page where I show the circuit diagram and arduino sketches: https://sites.google.com/site/...

Here's the Arduino sketch and circuit for controlling the solenoids: https://123d.circuits.io/circuits/1579637. This sketch uses a potentiometer as the selector, and a switch for manual mode. In Drive mode will change between all gears sequentially after a period of time.

There's a second sketch for realistic operation where changes gears automatically considering speed and how much the pedal is depress (require a speed sensor on the output and a potentiometer for the pedal). Also has manual mode, manual override, delay engaging clutches, display, etc. If you want this sketch, go to the project page.

There is also an adapter to fit this transmission to the Toyota 4 Cylinder 22RE Engine made by ericthepoolboy. This is the adapter: http://www.thingiverse.com/thi...

I don't have a 3D printer so I would appreciate any feedback from people that printed one to improve the model. Still, I check all parts on Cura to make sure all is ready to print, except the orientation. You will have to rotate some parts to print it in the optimum way to have the least overhanging and warp.

A special thanks to the user RobinSwa for helping me improve the model by testing it and giving me useful feedback.

Last Update: 06/05/2016

Design Files

File Size

Case_x1.stl
4.81 MB
C1_Clutch_x1.stl
172 KB
C1_Fork_Extension_x1.stl
50.5 KB
C1_Fork_x1.stl
330 KB
C1_Slider_x1.stl
468 KB
C2_Clutch_x1.stl
214 KB
C2_Fork_Extension_x1.stl
31.1 KB
C2_Fork_x1.stl
341 KB
C2_Slider_x1.stl
503 KB
C3_Clutch_x1.stl
132 KB
C4_Clutch_x1.stl
121 KB
C5_Clutch_x1.stl
106 KB
C-Clip.STL
14.9 KB
Dipstick_x1.stl
4.93 MB
Front_Cover_x1.stl
480 KB
Input_x1.stl
240 KB
Oil_Pan_x1.stl
148 KB
Output_-_P3_Carrier_x1.stl
454 KB
P1_Carrier_-_P2_Ring_x1.stl
1.19 MB
P1_Planet_x4.stl
174 KB
P1_Ring_x1.stl
970 KB
P1_Sun_x1.stl
726 KB
P2_Carrier_-_P3_Ring_x1.stl
1.16 MB
P2_Planet_x4.stl
184 KB
P2_Sun_-_P3_Sun_x1.stl
577 KB
P3_Planet_x4.stl
188 KB
Parking_Pawl_x1.stl
83.8 KB
Top_Cover_x1.stl
642 KB

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