300 Lb 3D Printed Gearbox
Hint: Summary: 3D printed geardowns for strengths up to wheel drive of life-size vehicles are possible.
160:1 Gearbox
https://www.thingiverse.com/thing:2375916
Explanation
148:1 Gearbox
https://www.thingiverse.com/thing:2550882
Lifting a Car
Almost.