Performance Engineering & Manufacturing Ford 9in Assembled Full Spool 3.70 Ratio 31-Spline

SKU: GSDD_CSFS37031
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Ford 9-inch Assembled Full Spool DifferentialAchieve maximum traction and consistent ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

Ford 9-inch Assembled Full Spool Differential

Achieve maximum traction and consistent power delivery with the Performance Engineering & Manufacturing Assembled Full Spool. Designed for the legendary Ford 9-inch rear end, this unit is the ultimate choice for drag racing and high-performance applications where equal torque distribution to both rear wheels is non-negotiable. This pre-assembled unit saves you valuable time and ensures professional-grade setup right out of the box.

Key Specifications

  • Application: Ford 9-inch Rear End
  • Ratio: 3.70 Gear Ratio
  • Spline Count: 31-Spline
  • Construction: Steel Full Spool
  • Condition: Assembled and Ready to Install

A full spool eliminates the differential action, locking the axles together for 100% power transfer to the wheels. This is critical for preventing one-wheel peels and ensuring your vehicle launches straight and hard every time. The 3.70 gear ratio provides an ideal balance between quick acceleration off the line and usable top-end speed, making it a versatile choice for a wide range of racing classes. Built from high-strength steel, this spool is designed to handle the massive torque loads generated by high-horsepower engines. The precision assembly ensures smooth operation and long-term reliability on the track. Whether you are building a dedicated drag car or a high-performance street machine, this differential case is the backbone of a strong drivetrain. Trust in the quality of Performance Engineering & Manufacturing for your next build. Find all your essential performance drivetrain components at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

Ford 9-inch Assembled Full Spool Differential

Achieve maximum traction and consistent power delivery with the Performance Engineering & Manufacturing Assembled Full Spool. Designed for the legendary Ford 9-inch rear end, this unit is the ultimate choice for drag racing and high-performance applications where equal torque distribution to both rear wheels is non-negotiable. This pre-assembled unit saves you valuable time and ensures professional-grade setup right out of the box.

Key Specifications

  • Application: Ford 9-inch Rear End
  • Ratio: 3.70 Gear Ratio
  • Spline Count: 31-Spline
  • Construction: Steel Full Spool
  • Condition: Assembled and Ready to Install

A full spool eliminates the differential action, locking the axles together for 100% power transfer to the wheels. This is critical for preventing one-wheel peels and ensuring your vehicle launches straight and hard every time. The 3.70 gear ratio provides an ideal balance between quick acceleration off the line and usable top-end speed, making it a versatile choice for a wide range of racing classes. Built from high-strength steel, this spool is designed to handle the massive torque loads generated by high-horsepower engines. The precision assembly ensures smooth operation and long-term reliability on the track. Whether you are building a dedicated drag car or a high-performance street machine, this differential case is the backbone of a strong drivetrain. Trust in the quality of Performance Engineering & Manufacturing for your next build. Find all your essential performance drivetrain components at GGCRACING.

Product Details

Product Description

Ford 9-inch Assembled Full Spool Differential

Achieve maximum traction and consistent power delivery with the Performance Engineering & Manufacturing Assembled Full Spool. Designed for the legendary Ford 9-inch rear end, this unit is the ultimate choice for drag racing and high-performance applications where equal torque distribution to both rear wheels is non-negotiable. This pre-assembled unit saves you valuable time and ensures professional-grade setup right out of the box.

Key Specifications

  • Application: Ford 9-inch Rear End
  • Ratio: 3.70 Gear Ratio
  • Spline Count: 31-Spline
  • Construction: Steel Full Spool
  • Condition: Assembled and Ready to Install

A full spool eliminates the differential action, locking the axles together for 100% power transfer to the wheels. This is critical for preventing one-wheel peels and ensuring your vehicle launches straight and hard every time. The 3.70 gear ratio provides an ideal balance between quick acceleration off the line and usable top-end speed, making it a versatile choice for a wide range of racing classes. Built from high-strength steel, this spool is designed to handle the massive torque loads generated by high-horsepower engines. The precision assembly ensures smooth operation and long-term reliability on the track. Whether you are building a dedicated drag car or a high-performance street machine, this differential case is the backbone of a strong drivetrain. Trust in the quality of Performance Engineering & Manufacturing for your next build. Find all your essential performance drivetrain components at GGCRACING.

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