This 30cc bottle of Yokomo YOKCS15000 is a silicone-based super blend formulated for RC-scale gear differentials. It is provided as a ready-to-use fluid labeled #15000 for hobbyists who tune differential behaviour in on-road and off-road models.
Its role is to influence torque transfer across the gear differential: heavier silicone grades produce stronger locking effects than lighter fluids. Choose #15000 when a firm diff response is needed to improve traction during hard acceleration or tight corner exits, while keeping in mind that overall handling is affected by tires, suspension and gearing too.
Fitting the oil is a straightforward maintenance task for compatible gear diffs and gearboxes: drain the old fluid, inspect seals and o-rings, then refill the diff cavity with the correct quantity. Refer to your chassis documentation for exact fill volumes and recommended service intervals.
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