LEGO Technic - differential gears (Gear) 24-16 in the new gray - Complete Set

LEGO 10pc Technic FRAMED DIFFERENTIAL GEAR SET Kit Pack Chassis Part Piece Crawler Unimog Car Truck Joint Axle Frame Liftarm

LEGO Technic Differential gear box kit (gears, pins, axles, connectors) 27 pieces

LEGO Technic - 10 x small universal joint in new light grey, 3 studs long

LEGO 50pc Technic gear & axle SET

LEGO Technic COMPLETE GEARBOX ASSEMBLY 2 x 4 x 3 1/3 Trans-Clear Wormbox gear motor REDUCER block Mindstorms robotics ev3 NXT transparent robot building power functions part 6588

LEGO Technic Power Functions Motor Set 8293 (10 Pieces)

LEGO Functions Power Functions XL-Motor 8882 (1 Piece)

The LEGO Power Functions Idea Book, Volume 1: Machines and Mechanisms

LEGO Technic Gears Assortment Pack

LEGO Technic Chain Link x100