Speedmaster Ford 9 in. third member assemblies are designed to help you get that horsepower to the ground. They include high quality nodular iron thru-bolt design center section, as well as a forged chromoly steel spool, 1350 series yoke, daytona pinion support, and gear ratio. Whether you're assembling a daily driver, street rod, or race car, Speedamster's third member assemblies will provide the durability that your vehicle deserves. CASE: Our Nodular Iron center sections will give you the perfect foundation for a high-quality, bulletproof rear differential, with a through bolt design and extra material is added to the bearing caps. These cases are offered in 3.062" & 3.250" bearing diameter to accommodate 28, 31, and 35-spline carriers and spools. The lightweight SPOOL gives you the traction you need by locking the axle shafts together, forcing your rear tires to turn at the same speed. They"re CNC-machined from forged chromoly steel to provide a more rigid ring gear mounting. This eliminates gear failure caused by case deflection or differential side-gear failure. The GEARSETS used are HI-PERFORMANCE 8620 Chrome-Nickel-Moly Steel. CNC machined from high-quality forgings to our exacting specifications and then heat-treated to obtain high impact and durability. Then lapped to allow for correct tooth contact and smoothness and for use in the performance market.
- Through bolt design and extra material is added to the bearing caps
- 1350 Billet Yoke
- Daytona pinion support
- 8620 Gear set
