6 Speed Allison Automatic Transmission

myminifactory

This model is based on the Allison 1000 automatic transmission and is not an exact replica, but it shares the same basic design and functionality. The most significant difference from the real transmission is the C1 and C2 clutches, which I designed to work with 3D printed parts and for easy engagement. Assembly video: https://www.youtube.com/watch?v=vvhICaIRjOY Gear ratios: 1st: 3.20 2nd: 1.86 3rd: 1.43 4th: 15 5th: 0.70 6th: 0.60 R: 4.41 I made the lower part of the case quite big so there is room for optionally putting solenoids to engage all the clutches and even a parking pawl. If you are interested in this, you should print all the "Solenoid Version" parts. This will allow you to engage the clutches more easily with switches or even change gears automatically with something like Arduino. 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/thing:1120974 I don't have a 3D printer, so I would appreciate any feedback from people who printed one to improve the model. Still, I check all parts on Cura to make sure they are ready to print, except for orientation. You will have to rotate some parts to print them in the optimum way to have the least overhanging. Instructions You need: * 1mm rod * 3mm rod * 21 self-threading screws to fit on a 1mm diameter hole * 2 self-threading screws to fit on a 2mm diameter hole * Several washers/spacers for the 1mm and 3mm rod * 1 snap ring or E-clip for the 3mm rod * 2 ball bearings 608ZZ - 8x22x7mm (inside diameter x outside diameter x width) The file names are self-explanatory. Print the number of times mentioned on the file name and assemble like shown on the video. Use the 3mm rod for the center of the transmission and for the clutch forks. The 1mm rod is to hold the planet gears to the carrier. I recommend putting washers in all planet gears and each side of the 3mm center rod. All the rods have parts where it should be fixed to a part very tight by pressure and another part where it should be loose so it can turn in that axis. For example, on the planet gears, the 1mm rods should be fixed to the carrier and the planet gear holes should be drilled so they are big enough to turn easily. As I show on the video, you need to put a snap ring or E-clip after the C2 clutch to hold all the planetary gear sets together. To do this, you need to create a notch on the rod. I recommend beginning the assembly from output to input, like in the video. P1, P2, and P3 are the names of the planetary gear set, numbered from input to output. If you don't know the name of the parts of a planetary gear set, here it is: * Sun gear: the gear in the middle * Ring gear: the big gear that covers all the gears * Planet gears: the gears that go between the sun gear and the ring gear * Carrier: the part that holds the planet gears The default version is designed for mechanical buttons to engage the clutches. For this version, you don't need to print the files that start with "Solenoid_Version". Solenoid Version: I made an optional case and some extra parts so you can add solenoids to engage all the clutches electrically. You need 6 push/pull solenoids with a body size of 30x15x15x30mm (LWT). I recommend this solenoid: DC 12V 1A 10mm Stroke Push Pull Type Open Frame Solenoid Electromagnet http://www.amazon.com/10mm-Stroke-Frame-Solenoid-Electromagnet/dp/B00HR8H38A/ref=pd_sim_sbs_328_1?ie=UTF8&dpID=41Cc6i7YiKL&dpSrc=sims&preST=_AC_UL160_SR160%2C160_&refRID=0GGZ30M84BCFJAXY1ASB If you want to build the solenoid version, don't print the following files: * Case_x1.stl * Clutch_Button_x3.stl Those files are only for the basic version that uses mechanical buttons to engage the clutches.