3Racing F109-12 Differential Rebuild Kit - Racing Setup  [F109-12]

3RACING F109 Hop-Up Option Rebuild Kit For #KIT-F109 Differential - F109-12
Price:
USD$6.30
Brand:
3Racing
Model:
F109-12
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Rebuild Strategy for the F109 Differential with 3Racing F109-12

The 3Racing F109-12 Differential Rebuild Kit provides the standard internal components used to restore correct gear mesh and limit unwanted backlash in F109 class cars. For competitive setups, renewing worn internal parts returns predictable torque transfer and consistent corner entry behaviour, which is critical for lap time repeatability.

Which diff oil grades complement the rebuild for race use?

Choose oil grade based on track grip and chassis setup. Lower viscosity gives freer differential action for loose surfaces; higher viscosity tightens the drive for high traction tracks. Test progressively to find the best lap time compromise.

Should I replace any other drivetrain parts when fitting the kit?

Inspect drive shafts, dog bones and bearing play during the rebuild. Replacing worn peripherals alongside the rebuild ensures the differential tuning translates to consistent on track behaviour.