| Part | Name | Releases |
|---|
| A021 | Brass Input Gear | |
| A029.A030 | Brass Gear for Single Speed Gearbox | |
| A041 | Metal Gears for D Series Gearbox | 14 |
| ABC012 | 130 Motor with Gearbox | |
| ABC013 | 180 Motor with Gearbox | 30 |
| AC021 | 260 Motor with Counter Rotating Output Gearbox | 5 |
| AC033 | 370 Motor + Counter Rotating Gearbox | 2 |
| AD009 | D12 D42 Gearbox with 260 Brushed Motor | 10 |
| AD028 | Dx4 Transfer Gear - Type A | 3 |
| AD029 | Dx4 Transfer Gear - Type B | 3 |
| AE003 | E1 Gearbox with Motors | 1 |
| OP-11018 | Gearbox Undercover | 32 |
| OP-11031 | 280 Motor & Gearbox | 4 |
| OP-11045 | WPL Brushless Motor + Gearbox | |
| OP.BHSOS | 2 Speed Gearbox Output Shaft Hex Shaft | |
| OP.DSGB | 2 Speed Gearbox with 370 Motor | |
| OP.SSGB | Single Speed Gearbox | 6 |
| SPG.AI | Axle Cover + Input Gear | 35 |
| SPM.SSMRU | 370 Motor with Reduction Gear Unit | 6 |
Hobbydex