The Tamiya 51469 TRF417 Differential II Cup Joint kit includes matching left and right pieces intended to enhance the durability of the stock TRF417 gear differential. The hard coat finish helps resist scratching and reduces the rate of part fatigue during normal hobby use.
Replacing worn cup joints with these hard-coated units can improve drivetrain consistency and reduce the need for frequent part swaps. They are a sensible item for anyone who wants cleaner gear engagement and longer maintenance intervals.
The parts are engineered to drop into the TRF417 differential assembly without extra machining. Installation is simple for experienced hobbyists and straightforward for those comfortable with basic differential service.
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