The Tamiya 51110 TB Evolution IV Ball Differential is a reliable spare aimed at TB Evo IV owners who want steady power delivery and easier handling tuning. It replaces worn components and helps keep setup predictable on race day.
Specifically matched to TB Evo IV mounting and drivetrain layout, this ball differential installs cleanly into the stock gearbox and works with common upgrade parts used by club racers.
Ball diffs let drivers control slip to influence corner entry and exit behaviour, offering a tuning advantage over solid gear diffs when chasing consistent lap times across changing grip levels.
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