HPI 72215 Gear Diff Adjustment Spring

Fine-tune the action and feel of your gear diff-equipped Nitro or electric car or truck with this convenient Gear Diff Adjustment Spring Set! Three springs are included to adjust how much the planetary diff gears inside the diff engage, giving you control over the amount of traction or slip you have at either the front or rear of your vehicle. Gear diff grease and a complete instruction sheet is supplied.