What axle ratio or rear-end gear pairs best with the Muncie M20?

A 3.73 or 4.10 rear gear works well for street or moderate performance use. The right pairing depends on your full combination — engine torque curve, vehicle weight, tire height, and how you drive all factor in. A heavier car needs less rear gear to get moving; a lighter build can run tighter. When those pieces don’t line up, the whole drivetrain feels off.

Not sure what ratio fits your build? Call 315-471-8141 or visit AutoGearSYR.com.

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