The Arrowmax AM-931015 bushing, dimensioned 4.6x6.5x4, is intended for use in pan car gear differential assemblies in 1/12 and 1/10 scales. Its role is to position the shaft and limit sideways movement so gear engagement remains stable during runs.
Measure the diff housing bore and shaft before fitting to ensure a correct match. Press the bushing in squarely and rotate the shaft to check for binding. Use a light smear of lubricant on mating surfaces to ease initial wear but avoid too much that could alter diff performance.
As part of setup and service, replacing worn bushings restores consistent backlash and improves repeatability. Note that changing bushing fit will affect gear mesh feel and axial freeplay, so re-evaluate diff lash and preload after any swap.
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