The Arrowmax AM-931020 bushing is a 4x6x3 sized replacement sleeve designed for pan car geardiff and similar differential assemblies in 1/12, 1/10 and F1 cars. It provides an internal locating surface to manage shaft runout and preserve correct gear clearance without referring to full-size vehicle use.
Fitment requires confirming the bore and shaft dimensions match the 4x6x3 spec, cleaning contact surfaces, and pressing the sleeve flush into the housing. Use light lubrication for initial run-in and verify axial and radial play after installation.
As part of maintenance and setup, this bushing can restore tighter mesh in ageing geardiff units and help refine backlash. Replace if you detect ovaling or excessive clearance that affects gear engagement and performance.
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