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Precision Built for 600HP to 1200HP+

CUSTOM FORD 9-INCH DIFFERENTIALS & COMPLETE CENTRES

High-performance Ford 9-inch diff centres, custom-width housings, and complete bolt-in assemblies. Precision built with genuine Motive Gears, 31 & 35-spline TUFF TRAC 7-pair helical LSDs, and full spools.

OUR FORD 9" RANGE & PACKAGES

Every 9-inch diff built by TuffDiffs is assembled to exacting tolerances with premium gear mesh, pinion preload, and backed by a 20,000km / 1-year warranty.

Full 9 Inch Differential Centre

31-SPLINE FULL 9” CENTRE

From $2,790

Ideal for tough street cars, classic muscle, and club strip racing up to 750hp.

  • Motive Gears premium ring & pinion gear set
  • TUFF TRAC 7-Pair Helical LSD or Full Spool
  • Choice of ratio: 3.00, 3.25, 3.50, 3.70, 3.89, 4.11
  • 1350 billet yoke upgrade available
35 Spline 9 Inch Differential

35-SPLINE PRO DRAG CENTRE

From $2,990

Maximum strength configuration built for heavy-hitting big blocks, boost, and transbrakes.

  • Extra-large 35-spline internal side gears
  • Motive Gears heavy-duty gear set
  • TUFF TRAC 7-Pair Helical or Lightweight Spool
  • Precision machined nodular iron or alloy case
OZ Classic 9 Inch Differential

COMPLETE BOLT-IN 9” PACKAGES

From $4,900

Complete custom 9-inch differential housing built to your exact track width and brackets.

  • Holden: LC-LJ, LH-LX, HD-HQ, VB-VS
  • Ford: XK-XF, EA-AU, Mustang, F100
  • US Muscle: Camaro, C10, Chevelle, Impala
  • Billet axles + slotted disc brake kits available

AVAILABLE 9-INCH UPGRADES & BRAKE KITS

• Commodore Slotted Disc Brake Kit: $1,290

Direct fit slotted rotors and reconditioned calipers.

• Aeroflow 4-Pot 12.9” Brake Kit: $1,490

Ultimate high-horsepower stopping power with billet 4-piston calipers.

• Custom Steel Brake Lines (Pair): $190

Hard-line plumbing pre-bent to your housing specs.

READY TO BUILD YOUR CUSTOM 9-INCH?

Submit your vehicle details, target horsepower, and preferred gear ratio. Craig will spec your ideal build.