A close-up view of an open metal gearbox or differential, showing gears and mechanical components inside, resting on a workbench with a plastic sheet and a wall-mounted paper in the background.

Confirm fitment with a diff specialist

Get advice from our specialists to make sure you’re choosing the right part for your vehicle and setup.

Mazda RX7 FD3S Rebuilt Rear Diff 3.9 LSD

$3,995.00 NZD

Confirm fitment with a diff specialist

Get advice from our specialists to make sure you’re choosing the right part for your vehicle and setup.

Suits: Mazda RX7 FD3S

Oil Capacity: 2L

Recommend Oil: Redline 75W140NS

Ratio: 3.9

Carrier Type: LSD

 

Key Features:

  • Complete Rebuild: Every differential is fully rebuilt using new bearings and seals.
  • Solid Pinion Bearing Spacer Upgrade: Replaces the factory crush sleeve for improved strength, durability, and consistent preload under high load.
  • Factory Helical / Torsen LSD: Smooth torque biasing differential for predictable handling and excellent street performance.
  • Ratio: Hard-to-find factory gearing offering good acceleration while maintaining comfortable cruising RPM.
  • 12-Month Warranty: Enjoy peace of mind with our 12 month / 20,000 km warranty when using Redline oil supplied by us.
  • Cusco 1.5 Way LSD Upgrade: Available for additional costs.
  • Free Shipping: Free shipping NZ wide!

If you have any questions, Please get in touch with us beforehand.

Comes painted with zinc bolts and vapour blaster rear cover.

Brand:
  • Personalised Service
  • Better by Design
  • Worldwide shipping
  • Regional suppliers

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Mazda RX7 FD3S Rebuilt Rear Diff 3.9 LSD  –  $3,995.00 NZD