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Mainshaft Compare

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7. A mainshaft comparison illustrates the SYE kit's length benefit. Also note how the OE mainshaft (bottom in the photo) has spiral-cut splines for the speedometer drive gear. This is a well-known weak point in the original design. This kit's new shaft doesn't have the spiral gears and also accommodates a 32-spline yoke, making it considerably stronger than stock.

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