Crate Axle Confessional -- Technical Article -- Chevy High Performance Magazine
Mike selected a 33-spline Moser spool (left) instead of a clutch-type Posi-Traction unit. The spool suits the hard-charging Nova's need for uniform power delivery to both slicks. Buyers have their choice of either type of differential for the same money, though 33-spline customers will pay a little more for a 33-spline limited-slip unit.
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