LEGO MOC Car with Custom Differential from 42006 by sebbl | Rebrickable - Build with LEGO
Technic, Gear Differential 28 Tooth : Part 73071 | BrickLink
How to use a Lego Technic differential for creating prime gear ratios for MOCs. Part 1 - YouTube
Simple driven, non-steered axle assembly with a differential lock, based on studless pieces. Building instruction included. | Lego gears, Lego technic, Lego wedo
LEGO Technic Differential gear box kit (gears, pins, axles, connectors) 27 pieces by LEGO : Amazon.co.uk: Toys & Games