Pro-Iron Package

(700+ hp; 33.50-lb. case)

The Pro-Iron package is our assembled third member for performance applications nearing or exceeding 700 horsepower. The assembly features a heavy-duty, nodular-iron gear case with chromemoly caps. Pro-Iron cases are created from D-4512 nodular iron, 8% stronger than nodular iron used in OEM cases. Additional ribbing and increased material around bolt holes and bearing bores create a virtually indestructible case suitable for any performance application. Stud holes are spot-faced for even fastener-clamping force and improved sealing. Chromemoly bearing caps are designed with increased thickness for added strength and ring-gear stability. Available case bores are 3.0625” for use with 28- and 31-spline axles and the larger 3.250” for street/strip 35- and 40-spline axles. Spool packages come standard with chromemoly yokes and forged aluminum pinion supports. Choices include 31-, 33- or 35-spline spools in lightweight aluminum or steel with a 40-spline, steel-spool upgrade available. S-Series cast-steel yokes and Daytona-style nodular-iron pinion supports are standard with posi-unit packages. A nodular-iron case, clutch-type limited-slip differential is standard with various upgrades available for specific performance requirements and axle-spline counts (torque-sensing, billet-half posi units and lockers). Ring-and-pinion-gear selections range from 3.40-6.50:1 and are professionally adjusted when assembled. Ring gears can also be lightened for additional weight savings.

Refer to technical data sheet for option pricing.

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