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Aftermarket And Stock Axle Shaft

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Harder, larger aftermarket shafts are a “Stage 1” upgrade. One example: Superior Axle & Gear’s Super 35 kit includes 30-spline 4340 chromoly shafts that are about 35 percent stronger than the OE Dana 35’s 27-spline units (which are made from 1050 steel). The diff also has to be changed to match the new spline count.