Pro Series Nodular Iron Case Assembly Aluminum Support with Lightweight Steel Spool Standard Gear & Chrome Moly Yoke


Part Number: PRF105

Complete Center Section Includes:

N1905 / N1906
3.062″ Bore Pro Iron Case for 31 or 33 spline
3.250″ Bore Pro Iron Case for 35 or 40 spline

• 8-10% Stronger Material Than Factory Nodular Iron
• Critical Areas Heavily Reinforced
• Chrome Moly Main Caps
• Solid Steel Adjuster Nuts

Billet Aluminum Tapered Bearing Pinion Support
Over sized bearings and races

D1553 / D1554 / D1555
Lightweight steel spool in 31, 33, or 35 spline

Choice of 3.00-6.50 Standard Gear

U1603 & U1610
Chrome moly 1350 Series Yoke with U-bolts

Professionally Assembled
Timken® Bearings & Races
Grade 8 Ring Gear Bolts


40 Spline Steel Spool………………. OPRF01

Ball Bearing Support………………. OPRF03
HD Yoke Cap Kit……………………… OPRF37

Lighten Ring Gear……………………. D3596

Pick-up collar
1 magnet…………….. U1613
2 magnet…………….. U1613-2
4 magnet…………….. U1613-4
8 magnet…………….. U1613-8
Sensor bracket……..N1927S



Strange Nodular Iron Third Member with Spool, Aluminum Pinon Support, and Chrome Moly Yoke.

With a housing manufactured from D-4512 nodular iron – which is significantly stronger than the iron used on factory rear ends – the Strange Pro Iron Center Section is built to your specifications by the expert technicians at Strange Engineering.

Strange Pro Iron Center Section Cases are reinforced with extra ribs and additional material; especially apparent in the areas of pinion support and carrier bearing bores. Massive chrome-moly bearing caps are retained by aircraft grade fasteners and solid steel adjuster nuts help to easily and securely setup ring and pinion preload and backlash. Specially engineered lubrication channels make Strange Pro Iron Center Sections the most reliable in the industry. All exterior bolt holes are spot-faced to prevent the possibility of lubricant leaks.

Pro Lightweight Spool

A Strange Lightweight Steel Spool in 31, 33, or 35 spine options. A drag racing spool will always turn both axles at the same speed with an equal amount of force. Due to the simplistic design, it is much stronger and lighter than any differential. It also allows the use of larger axles that can handle greater amounts of torque. This makes it the best choice for Drag Racing, Drifting, and other forms of motorsports that require uninterrupted transfer of power to both wheels. Spools should never be considered for a street application. They are produced in forged steel, forged aluminum, and billet aluminum.

Strange Chrome Moly 1350 Series Yoke

Made from heat treated 4140 chrome moly steel, this Strange Pinion Yoke has extra surface area for increased strength. Strange Chrome Moly Yokes are manufactured to accommodate the Strange Magnetic Pick-Up Collar. This yoke has extra chrome moly in critical areas, and it is finished with a black oxide.

Guidelines and Torque spec

You may also like…

  • OPRF01

    Upgrade – For New Ford 9″ Center Section From Pro Series Spool to 40 Spline Pro Series Spool

    PN : OPRF01
    Read more
  • P1016-Pro Race Axle Package  40 Spline Solid Axles  3.150" Axle Bearings, & 5/8" Stud Kit

    Pro Race Axle Package 40 Spline Solid Axles 3.150″ Axle Bearings, & 5/8″ Stud Kit

    PN : P1016
    Select options
  • OPRF03

    Upgrade – For New Ford 9″ Center Section From Tapered Bearing Support to Tapered / Ball Support

    PN : OPRF03
    Read more
  • OPRF37

    Upgrade From U-Bolts To Heavy Duty Cap Kit

    PN : OPRF37
    Read more

Recently viewed products


Return Codes to use: