Big 9-Inch Options
Ford's super-durable 9-inch differential was the company's first removable carrier rearend when it debuted in 1957. The 9-inch Ford, named for its 9-inch ring gear, has been the industry standard for performance rearends for five decades. In NASCAR, the Ford 9-inch is the only rearend anyone runs, including GM and Chrysler. Currie Enterprises has made the 9-inch Ford something of an institution, offering a variety of 9-inch designs for many uses and budgets. Let's take a look at what will fit your lifestyle and budget.
The Currie/Strange lightweight...
The Currie/Strange lightweight aluminum 9-inch gearcase offers you strength coupled with less weight. Available in 3.060- and 3.250-inch carrier bearing sizes, the Currie/Strange gearcase is available polished and unpolished. Currie/Strange Polished Aluminum Gearcase: $425.95
This is the Currie/Strange...
This is the Currie/Strange nodular iron 9-inch gearcase for when you're going for broke in the power department. Available in 3.062- and 3.250-inch carrier bearing sizes, the Currie/Strange nodular case is for going racing.
Currie/Strange Nodular Iron Gearcase: $399.95
Ground Power
Building the right 9-inch Ford for your project begins with a solid foundation (the gearcases just mentioned). There's an array of gearcases (also known as chunks, pumpkins, third members, differentials, and more) to fit a variety of budgets and missions. Your budget, expected mission, and the amount of power your engine makes determine choice.
If you're seeking a limited-slip...
If you're seeking a limited-slip differential with nice street manors, the Currie Trac Lock is perfect for your Ford street project because it uses clutches to equal the distribution of power to both wheels. Available for both 28- and 31-spline applications, the Currie four-pinion Trac Lock is designed primarily for Ford 9-inch castings. You may also run the Trac Lock in a Currie 9-Plus. Currie Trac Lock: $399.95
When it comes to differentials, there's a whole lot more going on inside the gearcase that mandates good, solid decision making during the planning stages. Noise and erratic operation make locking differentials a bad idea for the street. Every time you turn a corner, locking differentials rear their ugly heads with a lot of noise. This is why limited-slip differentials make more sense for street use.
Most limited-slip differentials use internal clutches, which slip quietly in the turns. Choosing a carrier also depends on how much power you intend to throw at it. Limited-slip carriers have their limits before horsepower and torque rip them to pieces. Each manufacturer will tell you the limits of a particular carrier. This isn't everything that's available from Currie, but here are some of the highlights.
The Detroit Locker is legendary...
The Detroit Locker is legendary for its use in a lot of world-beating Ford applications. This time-proven differential remains true to its legend on the racetrack. It offers a solid mechanical lock-up to both drive wheels, ratcheting only in turns. Available in 28-, 31-, and 35-spline, the Locker is an unbeatable choice for racers. Order this one for your Ford or Currie 9-Plus.
Currie/Detroit Locker: $499.95
Here's a locker you don't...
Here's a locker you don't have to live with all the time. The Currie/ARB Air Locker engages only when you need it. No ratcheting. No noise. You may order this one in 31- or 35-spline configurations. Like the Detroit Locker, the ARB fits both Ford and Currie gearcases.
Currie/ARB Air Locker: $879.95
Build your own carrier with...
Build your own carrier with Currie's open carrier--available loaded or unloaded--with or without side gears. Made from super strong nodular iron, the open carrier gives you a choice. It can accommodate a Powertrax differential, 9-Plus Mini-Spool, and a host of others. Choose 28- or 31-spline. Currie Open Carrier (Empty): $109.75 (28 or 31-spline): $359.25