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9-Inch - Currie TwinTrac (31-Spline)

Currie TwinTrac® helical gear style limited slip differential for 9-inch rearends


Features:

  • Currie TwinTrac® Helical-Gear Style Limited-Slip Differential
  • High Torque Bias Drives Both Wheels for Maximum Traction
  • Reliable and Predictable with Smooth, Seamless Operation
  • No Clutches or Springs to Wear-Out
  • No Special Lubrication or Friction Modifiers Needed

Details:

  • Designed for 9-Inch Rearends
  • Accepts 31-Spline Axles
  • Bearing Journal 1.780
  • Currie 85W-140 Weight GL6 Rated Gear Oil Recomended

Due to limited initial availability, the TwinTrac is only available in complete third members and rearends

SKU: CE-5036
$450.00

Currie TwinTrac® Helical-gear limited-slip differential (LSD) is the modern replacement for the classic clutch-style Posi. Under normal driving conditions, the TwinTrac operates like an open differential, allowing the wheels to spin at different speeds to negotiate turns smoothly. However, when accelerating, if a tire begins to lose traction, the helical-gears inside the TwinTrac automatically engage, applying power to both rear wheels. When the acceleration (torque) lessens, the differential resumes regular operation. The TwinTrac is maintenance-free and will maintain its high torque bias for life, as it relies on no clutches or springs that wear out.

 

Gear Oil Recommendations

  • For all 9-inch applications, Currie recommends 85W-140 weight GL6 rated petroleum-based gear oil
  • Synthetic oils are not recommended for 9-inch gears or the TwinTrac limited-slip differential
  • Friction modifiers should not be used, as they will decrease differential bias and negatively impact performance

 

Currie TwinTrac® Helical-gear limited-slip differential (LSD) is the modern replacement for the classic clutch-style Posi. Under normal driving conditions, the TwinTrac operates like an open differential, allowing the wheels to spin at different speeds to negotiate turns smoothly. However, when accelerating, if a tire begins to lose traction, the helical-gears inside the TwinTrac automatically engage, applying power to both rear wheels. When the acceleration (torque) lessens, the differential resumes regular operation. The TwinTrac is maintenance-free and will maintain its high torque bias for life, as it relies on no clutches or springs that wear out.

 

Gear Oil Recommendations

  • For all 9-inch applications, Currie recommends 85W-140 weight GL6 rated petroleum-based gear oil
  • Synthetic oils are not recommended for 9-inch gears or the TwinTrac limited-slip differential
  • Friction modifiers should not be used, as they will decrease differential bias and negatively impact performance