My first project was a functioning Torsen limited slip differential. I found this design on Thingiverse. It took several days to print all the parts (I had to reprint a few things dude to bed leveling issues). I sanded the gears with 220 and 400 grit sandpaper.
Check out the original design here: https://www.thingiverse.com/thing:1722483
Printer Brand: Creality
Printer: Ender 3 Pro
Rafts: No
Supports: No
Resolution: 0.2
Infill: 20%
Filament: Hatchbox PLA
