Eaton Truetrac Alum. Posi Carrier Complete Ford 9" Differential

Assembled by Professionals

Hand-assembled by trained experts in-house, our Ford 9-inch third members are built from quality components with an exact step-by-step process. We bring this combination of precision assembly and quality components to you at a price that can't be beat. We trust these third members so much, they're the go-to choice for our own rides, from the street to the track.

Lightweight Aluminum 9-inch Center Section Reduces Unsprung Weight

There's no denying that the Ford 9-inch axle is one of the most popular performance axle swaps in the history of automotive performance. Not only are there more 9-inch axles under hot rods and muscle cars than Ford ever produced, but they're found under many a ride that isn't even a Ford, such as first generation Camaros, C10 pickup trucks, G-body race cars, and much more. While they are known for their strength, they are also known for their weight. They are among the heaviest car-based axle assemblies known. While that does help make them strong, it also means you're carrying around additional unsprung weight that hurts performance and handling. One of the simplest options to reduce weight on your Ford 9-inch is by swapping to a Ford 9-inch center section made from aluminum.

Using a 9" aluminum center section provides similar, if not even more strength, than traditional gray iron third members while shaving 10-12 pounds off your ride's unsprung weight. What does that ultimately mean? For your car or truck that means quicker acceleration, better handling, and even improved braking, as your suspension and axle can respond more quickly to changing road conditions, keeping the tires in better contact with the road. Building your Ford 9-inch with an aluminum third member provides all these benefits while still allowing one of the largest reasons for running the Ford 9-inch in the first place, an easily removable Ford 9-inch case. Using the bolt in Ford 9-inch third member permits owners to swap gear ratios or differential types with ease without requiring difficult ring and pinion gear setup each time like weaker integral carrier housings require, such as GM's 10-bolt.

Cast From A356-T6 Aluminum And Precision Machined For An Exact Fit

Getting a proper pattern on the ring gear teeth is crucial. Our time-proven, step-by-step process ensures the correct backlash, preload, and proper amount of pinion shims to ensure the correct pattern on the ring gear teeth.

Using premium alloys like A356-T6 means you're getting a precision machined cast part that is void of any porosity with exacting surface tolerances providing leak free installation and easy fitment of bearings, seals, and more to build the perfect Ford 9-inch third member for your 9-inch axle. Forged aluminum main caps, secured by Grade 8 through bolts for maximum strength that reduces gear deflection, while billet steel adjusters with high-strength locks ensure that the ring and pinion are properly meshed and stay that way.

Eaton 913A586 Detroit Truerac Steel Differential

Gear-driven limited-slip design automatically delivers torque to the wheel with the most grip, boosting control in all conditions. Engineered specifically for 3.25 and up gear ratios, perfect for performance, street, or off-road builds. Weighs only 16.59 lbs while delivering reliable torque management and long-lasting durability. Features a 1.32" axle shaft diameter and 9" ring gear size for consistent power transfer and superior drivetrain stability.

Features

• A356-T6 housing with 3.062-inch carrier bearing race diameter
• Forged aluminum through bolt cap design for additional strength
• Hand-assembled by our trained technicians for an unbeatable combination of quality and value
• Track-tested durability in our own cars – we race what we sell
• Precision assembly for the correct backlash, preload, and pinion shims to ensure the correct gear pattern
• Billet steel adjuster nuts with heavy duty keepers to maintain ring And pinion settings
• Ring and pinion gears made from 8620 cold-rolled steel for long wear
• Lightweight aluminum housing has forged caps and extra beef where needed while saving 12 lbs. over cast iron versions
• Large bearing forged aluminum "Daytona" style 10-bolt pinion bearing for strength and reliability
• Spacer and shim setup maintains critical pinion depth settings and is easier to service than traditional crush sleeves
• Clutch style positraction differential gives limited-slip performance and quiet operation
• Ring gears assembled with Grade 9 hardware, 15 percent stronger in tensile strength than Grade 8
• Viton® pinion seal, resistant to chemicals and high temperatures
• Grade 8 Carrier cap through bolts for additional strength
• Lock-style pinion nut with pre-applied Loctite®
• Available in both 28- and 31-spline axle options and from 3.00 to 4.56 gears
• Standard gear oil fill location on driver's side of casting
• Includes form-fitted, reusable red poly storage case