The Arrowmax AM-930005 drag-assisted oneway is an aftermarket front differential unit made to fit SERPENT 988 and 989 chassis. Its drag-assisted mechanism modifies how the front engages under drive, adding an option for drivers refining steering response and front traction.
Marketed as a direct-fit upgrade for the specified Serpent models, this part emphasises changing engagement feel and torque transfer behaviour rather than claiming specific numeric improvements. Fitting requires access to the front differential housing and basic RC tools; it is intended for hobbyists comfortable with simple gearbox service.
For those adjusting front-end balance, the AM-930005 provides a different engagement profile to help tune predictability and turn-in. Always confirm fit for your Serpent 988 or 989 and follow normal differential maintenance after installation.
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