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The Quaife Automatic Torque Biasing (ATB) differential enables your car to accelerate quicker and corner faster. How? By getting the power to the ground!

The Quaife differential powers both drive wheels under nearly all conditions, instead of just one. With an ordinary open differential, standard on most cars, a lot of precious power is wasted during wheelspin under acceleration. This happens because the open differential shifts power to the wheel with less grip (along the path of least resistance). The Quaife, however, does just the opposite. It senses which wheel has the better grip, and biases the power to that wheel. It does this smoothly and constantly and without ever completely removing power from the other wheel.

In drag-race style, straight-line acceleration runs, this results in a close to ideal 50/50 power split to both drive wheels, resulting in essentially twice the grip of an ordinary differential (they don't call open diffs "peg legs" for nothing).

In cornering, while accelerating out of a turn, the Quaife biases power to the outside wheel, reducing inside-wheel spin. This allows the driver to begin accelerating earlier, exiting the corner at a higher speed.

The Quaife also controls loss of traction when the front wheels are on slippery surfaces such as ice and snow or mud, providing the appropriate biased traction needed to overcome these adverse conditions. The Quaife differential provides constant and infinitely variable drive. Power is transferred automatically without the use of normal friction pads or plates seen in other limited-slip designs.

The Quaife's unique design offers maximum traction, improves handling and steering, and puts the power where it is needed most. A definite advantage whether on the track or on the street.

The Quaife is extremely strong and durable and since the Quaife is gear operated, it has no plates or clutches that can wear out and need costly replacement.

Every Quaife differential comes with a Limited Lifetime Warranty.

We are so confident in the durability of the Quaife, we back it up for life.

The Quaife is great for street driving or racing. Racers don't have to put up with locking mechanisms or spools that tear the steering wheel out of their hands when cornering. Because it behaves like an open differential during ordinary driving, street drivers will have trouble telling it's there until pushing the car's limits.

The Quaife has been proven in everything from compact drag racing to Pro Rally to Formula 1. The Quaife ATB Differential provides racers with such an advantage, it has become "required" equipment for a winning effort.

Expand your vehicle's limits with the Quaife Differential!

  • It makes power work FOR you, not against you.
  • Get the power to both drive wheels, not just one.
  • Accelerate quicker. Corner faster.
  • Without losing driveability.
  • The Quaife directly replaces the stock differential
  • Once installed, it never needs rebuilds.
  • Every Quaife Differential has a Limited Lifetime Warranty.
  • QDF13L, QDF10L, QDF11L

Quaife Differentials require no modification to install in a Base model vehicle with open style factory diff.  However if your car is equipped with a factory LSD you have two possible options to properly install an aftermarket Limited Slip Differential:

A) Purchase a Base Model LSD and add the optional $160 Stub Shaft assmebly
B) Purchase the Factory LSD Model Differential and DO NOT purchase the $160 Stub Shaft assembly, this will require the long stub shaft to be machined. 

Please note:  Both versions of the Quaife Differential are identical in operation and specifications.

When installing this differential into your factory case you will find that removing the bearings on the diff to be nearly impossible. Choose to add a new side bearings and seals as an option below.  

Available Options:


Additional Parts:



What our customers say...

I installed this into a 2006 Base Model 350z. Stock config had an open differential. The instant I got my ...

Rated by Verified Customer Purchase Read More

Questions our customers have asked...

I have a 14 auto with an open diff. Is this a direct fit besides shimming and backlash adjustement.

Response: Yes, As long as you select the Base Automatic option. You will need side bearings and likely shims for the install.

Do i need to purchase stub axle flanges to install on my 03 base 350z

Response: No you can just purchase the base model Quaife.