Detroit Speed Third Member Assembly 31-Spline With 8.8 Truetrac Gearset Ford 9”
Highlights
- High-Strength Nodular Case
- Eaton Truetrac Differential
- Bolt-On Installation
- Available In Several Ratios
Detroit Speed Ford 9” 31-Spline Third Member Assembly with 8.8 Truetrac Gearset.
For those serious about their performance build, the Detroit Speed Ford 9” 31-Spline Third Member Assembly with 8.8 Truetrac Gearset delivers. With its patent-pending 31-spline Eaton Truetrac 8.8-inch differential, this assembly provides a quieter and more efficient gearset than standard 9-inch components. Plus, the internal oil channels continuously lubricate the pinion bearings, ensuring superior durability. The high-strength nodular cast iron case, coupled with a premium ring and pinion utilizing ARP ring bolts with safety wire, offers added strength and safety.
Features and Benefits:
- Patent-pending 31-spline Eaton Truetrac 8.8-inch differential
- Quieter and more efficient gearset than standard 9-inch components
- Continuous lubrication of pinion bearings provided by internal oil channels
- High-strength nodular cast iron case
- Premium ring and pinion utilizing ARP ring bolts with safety wire
- Solid pinion preload spacer
- Forged alloy steel carrier-bearing caps
- 1350 forged steel pinion yoke with U-bolt kit
- Threaded jack bolt holes in mounting flange ease case removal from axle housing
- Case includes mounting holes for bolt-on accessories
- Available in the following gear ratios: 3.08, 3.27, 3.55, 3.73, and 4.10
The carrier-bearing caps are forged from alloy steel for even more added durability. The 1350 forged steel pinion yoke with U-bolt kit and jack bolt holes in the mounting flange make for easy case removal from the axle housing, while the case includes mounting holes for bolt-on accessories. With several gear ratios to choose from, you can tailor your assembly to meet your exact needs.
Vehicle Fitment:
- 1965-1973 Mustangs
- 1966-1977 Broncos
- 1948-1979 F-100s
Tech Tip:
- The FN988 case is compatible with all 8.8-inch gears, differentials, and spools. Alternate options are available. Contact us for custom builds or combinations not listed.
California Residents: Proposition 65 Warning
Related Categories: Mustang Parts, Mustang Rear Axle, Mustang Differentials, Mustang Ring & Pinion Gear Sets, Ford Bronco Parts
Vehicle Fitment
This product will fit the following Bronco years:
This product will fit the following F-100 years:
- 1948,
- 1949,
- 1950,
- 1951,
- 1952,
- 1953,
- 1954,
- 1955,
- 1956,
- 1957,
- 1958,
- 1959,
- 1960,
- 1961,
- 1962,
- 1963,
- 1964,
- 1965,
- 1966,
- 1967,
- 1968,
- 1969,
- 1970,
- 1971,
- 1972,
- 1973,
- 1974,
- 1975,
- 1976,
- 1977,
- 1978,
- 1979,
This product will fit the following Mustang years: