WLtoys 1/28 Ball Differential Upgrade the metal fittings to adjust the elastic k989 K999
Development instructions
WLtoys 1/28 rc car is actually very strong, the weakness is the differential speed, easy to scan the teeth, so we use the awd's bead difference to improve, the cup is lengthened, and the metal iron material is heat treated and blackened. Moreover, it is possible to adjust the tightness by itself, and it can be used as a straight shaft, and the drift is very useful. Anyway, I used this difference, no longer worry about the tooth
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