This aluminium ball differential is supplied as a replacement unit for Tamiya TRF 416 on-road chassis that specify a ball-type differential. It is a rebuildable internal diff that lets tuners adjust ball preload and lubricant choice rather than swapping a sealed gear set.
Compatibility is restricted to models built around the TRF 416 differential format. Confirm your chassis parts list and housing dimensions before purchase to ensure the internal diff element and case match. Intended use is for electric on-road RC models only.
Fitting follows standard diff service practice: remove the transmission housing, extract the fitted diff assembly, transfer or renew internal components as required, and reassemble using correct shims and torque. Care with aluminium parts is important to avoid over-tightening small hex screws during reassembly.
Typical tuning and maintenance include changing ball preload, varying diff fluid viscosity, and inspecting balls and races for wear to tailor traction and steering response. Regular cleaning and lubrication will keep engagement predictable and reduce wear.
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