These replacement gear diff shafts are supplied as a pair and designed for the LAZER ZX7.5 differential assembly. They act as wearable components for rebuilding or refreshing the internal gear diff when shafts develop play or wear from regular running.
Compatibility is limited to LAZER ZX7.5 models that use the same internal gear diff layout; confirm fitment with your chassis before fitting. Two pcs are included to cover both sides of a standard gear differential.
Installation notes: this is a scale RC accessory. Replace the shafts during a differential service by disassembling the diff, cleaning internals, inspecting gears and bearings, then reassembling with correct spacing and grease. Correct seating of the shaft prevents binding and helps restore expected diff behaviour.
Tuning role: replacing worn diff shafts can reduce endplay and improve predictability of differential engagement. Combine shaft replacement with a check of spur and pinion gear mesh and bearing condition for best results.
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