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Complete, ready to run, drop in lightweight aluminum case Ford 9-inch third member set up for 31-spline axles. Options include choice of differential, gear ratio and 1330 or 1350 pinion yoke.

***CONFIGURE OPTIONS TO SEE FULL PRICE***

SKU: CE-4028AK
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Reduces friction, operating temperature and gear wear

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$1,044.05

Complete lightweight aluminum, drop-in Currie Ford 9-inch third member set up for 31-spline axles. This unit is well suited for weight sensitive applications with moderate horsepower. If you have a heavy vehicle, hi-horsepower and launch aggressively, the HD-Pro Aluminum 9-inch third member and upgraded 35-spline axles would be better options. 

AllCurrie Ford 9-inch third members are assembled by our in-house experts with decades of rearend setup and assembly experience, so you can trust the finished product.

 

Currie 9-inch Third Member Features:

  Gear Case - Lightweight Strange Aluminum 9-inch gear case weighs just 13.69 lbs. compared to 27 lbs. for an iron case
     
  Pinion Support - Billet aluminum big bearing (Daytona) pinion support features a larger inner pinion bearing for increased strength and oil passageways designed for extended high-speed use
     
9-inch master Bearing Kit   Master Bearing kit - New Timken master bearing kit with seals and solid pinion spacer
     
Assembly labor   Labor - Fully assembled and set up in-house by skilled professionals

 

 

9-inch Third Member Options:

9-inch Ring and Pinion   Gear Ratios – Select from a wide range of ratios. Currie uses only the highest quality Motive Gear Performance® series (Orange box) ring and pinion sets in our 9-inch crate rearends
     
9-inch Limited Slip   Differential Options - Choice of 31-spline helical gear limited slip, automatic locking differential or a steel spool
     
Billet 1350 Yoke   Pinion Yoke - Choice of 1330 or 1350 short yokes in nodular iron, forged steel, billet steel or billet aluminum 
     
Gear Polishing   REM® Isotropic Polishing - Removes surface imperfections created during the gear manufacturing process. Polishing eliminates the need for a break-in period, decreases friction, reduces operating temps and removes stress risers, to help gears last longer and run quieter

 

 

Differential Options Explained

Truetrac and Wavetrac - Helical gear limited slip differentials (LSD) are the modern replacement for the classic clutch style limited slip differential. Under normal driving conditions, helical gear LSDs operate as a standard or open differential, allowing one wheel to spin faster or slower as necessary without the noise or harsh operation of a clutch style limited slip. When a drive wheel begins to slip, the helical gears inside the differential automatically engage, transferring torque to both rear wheels to maximize traction. When the wheels regain traction, the differential resumes normal operation. Unlike a traditional clutch type LSD, helical gear LSDs require no special oil additive or maintenance to replace worn and tired clutches, as these units have no wearable parts, require no special maintenance and maintain their torque bias for the life of the unit.

Detroit Locker - Automatic locking differential, designed to lock and unlock automatically when torque is applied in either forward or reverse directions when locked it acts like a spool driving both wheels equally.  When coasting or rolling into a corner (no torque applied) the Detroit Locker unlocks and momentarily operates like an open differential permitting the wheels to rotate freely. When torque is applied, exiting the corner the unit locks and drives both wheels equally. The key benefits of the Detroit Locker, are its rugged construction and superb performance. The only negative is that the automatic lock and unlock operation can create a clunking sensation that can be both felt and heard in the vehicle.

Spool – The spool is the simplest and strongest option, but it lacks differential action, as both axles are joined together by the spool's solid center. Spools are not recommended for the street, as the place high twisting loads on the axles, increase tire wear and can negatively impact handling. Spools are typically only used for drag racing applications where straight-line performance is the only concern.

Complete lightweight aluminum, drop-in Currie Ford 9-inch third member set up for 31-spline axles. This unit is well suited for weight sensitive applications with moderate horsepower. If you have a heavy vehicle, hi-horsepower and launch aggressively, the HD-Pro Aluminum 9-inch third member and upgraded 35-spline axles would be better options. 

AllCurrie Ford 9-inch third members are assembled by our in-house experts with decades of rearend setup and assembly experience, so you can trust the finished product.

 

Currie 9-inch Third Member Features:

  Gear Case - Lightweight Strange Aluminum 9-inch gear case weighs just 13.69 lbs. compared to 27 lbs. for an iron case
     
  Pinion Support - Billet aluminum big bearing (Daytona) pinion support features a larger inner pinion bearing for increased strength and oil passageways designed for extended high-speed use
     
9-inch master Bearing Kit   Master Bearing kit - New Timken master bearing kit with seals and solid pinion spacer
     
Assembly labor   Labor - Fully assembled and set up in-house by skilled professionals

 

 

9-inch Third Member Options:

9-inch Ring and Pinion   Gear Ratios – Select from a wide range of ratios. Currie uses only the highest quality Motive Gear Performance® series (Orange box) ring and pinion sets in our 9-inch crate rearends
     
9-inch Limited Slip   Differential Options - Choice of 31-spline helical gear limited slip, automatic locking differential or a steel spool
     
Billet 1350 Yoke   Pinion Yoke - Choice of 1330 or 1350 short yokes in nodular iron, forged steel, billet steel or billet aluminum 
     
Gear Polishing   REM® Isotropic Polishing - Removes surface imperfections created during the gear manufacturing process. Polishing eliminates the need for a break-in period, decreases friction, reduces operating temps and removes stress risers, to help gears last longer and run quieter

 

 

Differential Options Explained

Truetrac and Wavetrac - Helical gear limited slip differentials (LSD) are the modern replacement for the classic clutch style limited slip differential. Under normal driving conditions, helical gear LSDs operate as a standard or open differential, allowing one wheel to spin faster or slower as necessary without the noise or harsh operation of a clutch style limited slip. When a drive wheel begins to slip, the helical gears inside the differential automatically engage, transferring torque to both rear wheels to maximize traction. When the wheels regain traction, the differential resumes normal operation. Unlike a traditional clutch type LSD, helical gear LSDs require no special oil additive or maintenance to replace worn and tired clutches, as these units have no wearable parts, require no special maintenance and maintain their torque bias for the life of the unit.

Detroit Locker - Automatic locking differential, designed to lock and unlock automatically when torque is applied in either forward or reverse directions when locked it acts like a spool driving both wheels equally.  When coasting or rolling into a corner (no torque applied) the Detroit Locker unlocks and momentarily operates like an open differential permitting the wheels to rotate freely. When torque is applied, exiting the corner the unit locks and drives both wheels equally. The key benefits of the Detroit Locker, are its rugged construction and superb performance. The only negative is that the automatic lock and unlock operation can create a clunking sensation that can be both felt and heard in the vehicle.

Spool – The spool is the simplest and strongest option, but it lacks differential action, as both axles are joined together by the spool's solid center. Spools are not recommended for the street, as the place high twisting loads on the axles, increase tire wear and can negatively impact handling. Spools are typically only used for drag racing applications where straight-line performance is the only concern.