Speedmaster Third Member Assembly Nodular 31-Spline TorqueWorm LSD Ford 9”

The Speedmaster Ford 9” Nodular Third Member Assembly with 31-Spline TorqueWorm LSD is an unparalleled choice for serious automotive enthusiasts. This top-of-the-line assembly features a high-quality nodular iron through-bolt design center section with billet bearing caps that have extra material added for ultimate strength and durability. The unique TorqueWorm 6-pinion gear type limited-slip differential is preloaded and faster-reacting, spreading the stress over a greater surface area to reduce internal load.

Features and Benefits:
- Great for daily drivers, street rods, and race cars
- High-quality nodular iron thru-bolt design center section
- Billet bearing caps have extra material added
- Unique TorqueWorm 6-pinion gear type limited-slip differential
- Preloaded and faster-reacting unit
- Spreads stress over a greater surface area to reduce internal load
- EN36 material is made for racing applications
- 8620 chrome-nickel-Moly steel outer case for long life and strength
- CNC machined high-quality gear sets
- Heat-treated for extreme durability and high impact
- Lapped for correct tooth contact and smoothness
- TDS long-style billet yokes CNC machined to exact specifications
- Available in several gear ratios

Made of EN36 material that's specifically designed for racing applications, the 8620 chrome-nickel-Moly steel outer case provides long-lasting strength, while the CNC machined high-quality gear sets are heat-treated for extreme durability and high impact. This assembly is lapped for correct tooth contact and smoothness and comes with TDS long-style billet yokes that are CNC machined to exact specifications. With several gear ratios available, this assembly is a great choice for daily drivers, street rods, and race cars.

Specifications:
- Part type: third member complete assembly
- Case style: Ford 9”
- Case material: nodular steel
- Main cap material: aluminum
- Main cap retention style: thru-bolt
- Carrier bearing diameter (in): 3.006”
- Pinion support bolt quantity: 5
- Standard pinion location: yes
- Ring gear load bolt: no
- Ring and pinion included: yes
- Ring and pinion ratio 3.50, 3.70, 3.89, or 4.11
- Yoke included: yes
- Yoke style: 1350 series
- Bearings included: yes
- Carrier type: 31-Spline Speedmaster Torque Worm LSD

Vehicle Fitment:
- 1965-1973 Mustangs
- 1948-1979 F-100s
- 1966-1977 Broncos

Please Note: These 3rd members are to be used with a mineral-based oil of a range of EP140 Extreme pressure at a minimum. NO split grades such as 85/140 (these are not recommended). Failure to use the correct oil can result in gear damage and noise.