All my models are printed on a Prusa i3 kit. You can find the one I use by clicking the link below. You can get 15% off by using code "GBTE"
Tronxy Prusa I3
This is the 5 speed transmission that comes bolted to the back of a 22RE. This is the 4WD version of the transmission so it has a mounting surface to bolt a transfer case to. The transfer case will be the next thing I will upload
Fully working. All 5 speeds plus reverse. It uses a good amount of 3mm rod and 623zz bearings. M2.5 x 5mm set screws and nuts were used due to the small size of some of the parts.
Updated assembly drawings
Shift linkage.stl file updated for more clearance. The old one will still work you just might have to modify it,
Transmission housing cover 1 had a problem with the source file not laying flat. New file has been uploaded.
Thanks pointing this out RossRobotics
The assembly diagrams are not that great. This model is more complex than the engine and is pretty much one giant assembly so it's hard to convey that through multiple assembly diagrams. There are a bunch of photos showing the parts and the locations but assembling this will take a little bit of know how. You will have to figure out which holes to drill, ream, and tap. There's not too many of them. Any questions, just ask.
See excel spread sheet for parts list, descriptions, and notes about parts. Most parts will require a Brim to prevent curling.
There is a test jig to print out to see if your gears mesh properly before you put everything together. If you're finding that your gears are too tight you can file the teeth down or scale the gears down in the X and Y directions a small percentage. Do not scale the Z. You can also scale up if you're finding that they are too tight.
I made the fit on the gears pretty loose so you should be able to just print them and go but it depends on your printer.
There are also three holes on the side of Transmission housing 2. These can be tapped and you can insert a ball/spring/set screw into them as well as make a groove on the shift shaft to make a detent so that each shaft is held in the neutral position. It helps keep the transmission from going into random gears while shifting or locking up due to two gears being engaged at the same time.
You will need to reprint the new engine stand or modify your current start so the transmission can mate to the engine.
For the hardware i still recommend boltdepot.com but amazon has pretty decent prices for packs of 100 for socket products.
The 3mm rod that is made by Amico on Amazon works great. Fits the bearings perfectly and is cheaper than the tool steel I recommended previously. If you buy the 10 pack of 150mm x 3mm or 200mm x 3mm rods then you will have more than enough.
If you find any issues with the files or assembly diagrams please let me know by commenting or private message.