Will the MJX HYPER GO 14207 RC Car F&R Differentials strip their gears if they are not lubricated?

They can. If the MJX HYPER GO 14207 RC Car Parts Front (P14207F) and Rear (P14207R) Differentials are operated for long periods without lubrication, increased friction between the gears can accelerate wear and, in severe cases, lead to stripped gears or gear damage. It is recommended to apply a small amount of gear grease to the differential gears during installation or routine maintenance. Proper lubrication helps reduce friction, minimize noise, and extend gear life. Avoid using too much grease, as excess lubricant can attract dirt and sand, which may reduce drivetrain performance.

Please note: The front and rear differentials for the MJX HYPER GO 14207 RC Car are different parts and are not interchangeable. Be sure to identify the correct front or rear differential before purchasing or installing a replacement.