The Arrowmax AM-931015 bushing, sized 4.6x6.5x4, is designed for pan car gear diff assemblies common in 1/12 and 1/10 models. It centres the diff shaft and controls lateral play so gear teeth remain correctly engaged under load.
Confirm housing bore and shaft diameters before you fit the bushing. Press it into the housing with steady pressure and check that the shaft rotates freely. A thin coat of light lubricant on the bore and shaft will reduce initial wear while preventing excessive drag.
For setup and maintenance, replacing old bushings is a simple way to restore consistent backlash and improve repeatability track to track. Keep in mind that different bushing fits will alter the perceived gear mesh and diff behaviour, so test and adjust after changes.
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