This RC-scale gear set is built for the LAZER ZX7.5 platform and serves as a direct replacement to restore a tired differential assembly. The LA402 kit supplies the internal gears required to sustain predictable torque transfer inside the differential housing on 1/10 electric on-road cars.
Because the kit is replacement internals rather than a complete case, chassis compatibility with LAZER ZX7.5 is the fundamental consideration before fitting. Swapping in fresh gears reduces slop and returns consistent engagement, aiding controlled handling during aggressive inputs.
Fitment tips: assess bearing condition and mating surfaces for wear prior to installation, set mesh and backlash precisely when reassembling the differential, and match your choice of differential oil or grease to the handling characteristics you want. Correct installation makes the set a useful tuning tool for reproducible differential behavior.
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