The Tamiya 9007664 Diff Pulley & Case is manufactured with durability in mind to support demanding driving conditions on the TRF421. It gives a stable platform for aggressive setup choices and longer service intervals.
This Tamiya 9007664 item resists wear and keeps gear interfaces precise under strain, helping to preserve handling characteristics when running hard on mixed surfaces.
For those testing multiple setups, this diff pulley and case provides consistent feedback and reduces the chance of drivetrain-related surprises during a run. It is straightforward to service between sessions.
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