GearFX - Ford 9 in. S-Series Center Section

31 Spline TrueTrac - 3.89 Ratio

Part # 070404-389DS Be the first to write a review
Estimated Shipping Date: Coming Soon
Notify Me When Available
Free Shipping
Your Price
Suggested Retail
Add to Wish List
Create a new list
Starting at $167 a month with Learn More
GearFX's Ford 9 Inch "S" Rear Gear is the perfect build for the High-Performance Aftermarket enthusiasts that wants a solid street gear. All GearFX rear gear builds use our championship winning build procedures and attention to detail. All parts are individually inspected and hand deburred for quality assurance. We only use the highest quality parts to produce a product that meets our standards.


  • 1350 Yoke with U bolt kit
  • Premium Pinion Seal
  • Aluminum Daytona Pinion Support
  • ARP Pinion Support Bolts
  • GFX Oil Slinger
  • TIMKEN Bearings
  • GFX Solid Pinion Preload Spacer
  • Eaton TrueTrac
  • Premium Ring and Pinion
  • ARP Ring Gear Bolts (Safety Wired)
  • No Oil Pump Option
Brand GearFXdriveline
Emission Code5
Gear Ratio3.89 Ratio
Product TypeRear Axles
California Proposition 65 RequiredYes
Part Number070404-389DS

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Add REM Isotropic Surface Finishing and Dyno Break-in below to increase performance, durability and trouble-free operation.

    Your Review

    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.