Yokomo RP-085050A Racing Performer Ultra #5000 Silicone Differential Oil for Gear Diffs  [RP-085050A]

Yokomo RP-085050A Racing Performer Ultra diff oil #5000
Price:
£9.37
Brand:
Yokomo
Model:
RP-085050A
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Product brief — Racing Performer Ultra

This silicone-based diff oil is created for RC gear differentials where consistent, smooth diff behaviour is required. The RP-085050A Racing Performer Ultra #5000 by Yokomo is offered as a high-viscosity solution to maintain differential behaviour and reduce rapid oil migration during extended running.

Designed with modern high-RPM electric drivetrains and heavy loading in mind, the oil aims to preserve lubricating film integrity under continuous stress. Manufacturer information notes that the product was tested in demanding competitive environments to confirm run-to-run stability.

From a tuning perspective, higher-viscosity oils like #5000 increase internal resistance and give a firmer diff action, used when a more locked response is wanted. Always ensure the diff housing is clean and components are reassembled to correct torque and shim settings so the oil performs predictably.
Remark :
Due to limited stock availability, please notice that some Yokomo items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

What does the "#5000" rating mean for track behaviour?

The "#5000" tag denotes a higher viscosity category within the Racing Performer Ultra family, meaning the diff will resist internal motion more strongly and provide a firmer, more stable response during acceleration and corner exit.

Are there special steps when filling a diff with this oil?

Ensure the diff is free of old oil and contaminants, then refill carefully and reassemble using the manufacturer's torque and shim recommendations. Proper assembly helps the oil work predictably and avoids leaks or inconsistent feel.

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