I have seen on some diff's that the thrust washer had/has broken/cracked and this allows the adjuster screw to move. Also the clutch should have some slip as you pull away under full power. Had no issues with mine yet but i do try and clean the exterior parts after every run.
jK
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DB01-R/RRR TRF 503 Carbon TRF 201XM,Fast Attack Vehicle.RC 10 Classic. Top Force Evo,Optima Mid, Mardave Cobra.
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