GearFX - GM 12-Bolt

30 Spline TrueTrac Differential - 3.08 Ratio

Part # 075601-308DS Be the first to write a review

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GearFX's GM 12-Bolt rear gear assemblies 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.


  • High Performance Pinion Yoke
  • U-joint Bolt Kit
  • Premium Pinion Seal
  • TIMKEN Bearings
  • Solid Pinion Preload Spacer
  • Eaton TrueTrac in 30 or 33 splines
  • Premium Ring and Pinion
  • ARP Ring Gear Bolts
Brand GearFXdriveline
Emission Code5
Gear Ratio3.08 Ratio
Product TypeOBS
California Proposition 65 RequiredYes
Part Number075601-308DS

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 Isotopic Surface Finishing to the ring and pinion to increase performance, durability and trouble-free operation. All required hardware is included

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