Part 3647 - Technic, Gear 8 Tooth

Part 32198 - Technic, Gear 20 Tooth Bevel

Part 6589 - Technic, Gear 12 Tooth Bevel

Part 3648 - Technic, Gear 24 Tooth with 1 Axle Hole

Part 6589 - Technic, Gear 12 Tooth Bevel

Part 6542 - Technic, Gear 16 Tooth with Clutch

Part 3649 - Technic, Gear 40 Tooth

Part 6588 - Technic, Gearbox 2 x 4 x 3 1/3

Part 69778 - Technic, Gear 12 Tooth

Part 18942 - Technic, Gear Rack 1 x 14 x 2 with Axle and Pin Holes

Part 6542 - Technic, Gear 16 Tooth with Clutch

Part 6573 - Technic, Gear Differential 24-16 Tooth

Part 64781 - Technic, Gear Rack 1 x 13 with Axle and Pin Holes

Part 60c01 - Technic, Gear 24 Tooth Clutch

Part 3648 - Technic, Gear 24 Tooth with 1 Axle Hole

Part 32498 - Technic, Gear 36 Tooth Double Bevel

Part 11955 - Technic, Gear 8 Tooth with Dual Face without Friction