XV-02/TT-02 Ball Diff Set 39T, RC differential set

The XV-02/TT-02 Ball Diff Set 39T is a Hop-Up Option set for XV-02 and TT-02 chassis cars, built to change the rear drivetrain feel with a ball differential and 39T gear. Its limited slip differential effect supports steadier rear traction when the car loads up under power, helping the chassis settle more cleanly through changing grip conditions. The set is supplied as a full differential assembly package with gear parts, outdrives, diff housings, washers, bearings, pins, spring and adjustment hardware. In a ball differential, the internal balls run between the diff plates and gear components, while the screw and adjuster set the pressure that controls how freely the differential action works. That mechanism gives a tunable alternative to a fixed setup and allows the rear end to react with a different balance under throttle. The design also aims to keep grease from leaking, which helps maintain lubrication where the moving contact surfaces need it. On the bench, this set suits drivetrain tuning, maintenance work and rebuilds for compatible XV-02 and TT-02 cars. Once installed, it supports running sessions where cleaner power delivery and a more settled rear end matter, whether the chassis is being refreshed or tuned for a different track surface.