Courtenay Sport Website

Welcome Guest, Please Login Below:
Email: Password:
Create An Account   Forgotten Your Password? Remember Me

Search online shop for:
Shopping Basket
Your Basket is Empty.
0Items in Basket:
Sales Enquiries
Monday - Friday:
9am - 1pm  2pm - 5pm
Saturday:  9am - 12pm
 01692 404313
 01692 404060
Fax: 01692 404069
International Enquiries
 +44 1692 404313
Fax: +44 1692 404069
Email:  UK/EU/Worldwide
Star Product
Featured Product
Secure Online
Secure Online Payments
Secure Payments by SagePay
Products: 1141
Prices: British Pounds £GBP
Customers Online: 256
Mailing List
To subscribe to our mailing list please register with us online:
VXR Logo
Limited Slip Differentials
Vauxhall Logo

Limited Slip Differentials for Vauxhalls

We are well known for our power upgrades, but power needs to be put to the road to be of any use. Tyre-squealing and wheel-spinning waste all that extra power that has been produced. This is where the benefits of a Quaife ATB LSD come into play.
The 'Automatic Torque Biasing' (ATB) differential is Quaife's unique patented design, and is an after-market differential that provides smooth, constant traction for racing or slippery road conditions.

Suitable as an ideal replacement for any front, rear or four wheel drive application, these ATB differentials have the added benefit of no adverse effect on the steering of a front wheel drive vehicle.

Quaife ATB differentials have been used in a wide array of applications, from Formula 1 cars, many areas of motorsport, to car manufacturers' for OE supply, to emergency and public utility vehicles where all weather mobility is essential, and where the product must perform in the most demanding of conditions.
The characteristics of the differential are that it progressively locks as torque increases; there are no plates or clutches to wear out, as the more conventional limited-slip designs incorporate. The ATB differential is particularly effective in combating the effects of FWD torque steer and understeer.

Quaife Engineering also offer their ATB differential with a lifetime warranty [Details Here], as a demonstration of the quality of the product.

So How Do They Work?..............

The Quaife Automatic Torque Biasing Differential enables your car to accelerate quicker and corner faster. How? Simply by getting the power to the ground! The differential powers both drive wheels under nearly all conditions, instead of just one.

With an normal open differential, fitted as standard on most cars, much precious power is wasted through wheel spin under acceleration. This happens because the open differential shifts power to the wheel with less grip - along the path of least resistance.

The ATB differential, however, does just the opposite. It senses which wheel has the better grip, and automatically biases the power to that wheel. It does this smoothly and constantly, and without ever completely removing power from the other wheel.

In cornering, while accelerating out of a turn, the ATB biases greater 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 differential also controls loss of traction when the drive wheels are on slippery surfaces such as ice and snow or mud, providing the appropriate biased traction needed to overcome these adverse conditions and 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 ATB differential's unique design offers maximum traction, improves handling and steering, and puts the power where it is needed most. A definite advantage, whether you are on the track or on the street. The ATB differential is extremely strong and durable, and since it is gear-operated, it has no plates or clutches that can wear out and need costly and regular replacement. There is no maintenance required to the unit, so once installed the unit can be forgotten, apart from the better road responses.

It 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 cars towards its limits.

The effect of fitting an LSD to a road car is quite dramatic. As a rough guide you can usually expect to trim half a second off your 0-60mph time making an otherwise standard car noticeably quicker than one without an LSD. Also the driver will notice that the car is far more willing to turn into a corner under power and will accelerate out far more readily with much improved traction.

M32 Quaife ATB Limited Slip Differential

Quaife M32 ATB LSD Click for Full Size Image Now available from Courtenay Sport, the Quaife ATB differential for M32 gearboxes. A direct replacement for the standard Vauxhall differential, the Quaife ATB differential transforms your car's performance, making getting the power down onto the road easier, for improved traction and driveability.

Unlike a conventional plate-style limited slip differential, the ATB diff relies on gears rather than clutch plates for its operation. That means it is much smoother in operation. Because of this, the ATB differential never locks harshly with a set pre-load of wheel slip across the driven axle, like a conventional LSD. Rather, the
differential automatically biases the torque away from the spinning wheel across the axle, to a constantly varying degree, and never locks.

The Quaife ATB differential has many benefits over a standard open differential, including maximising traction and minimizing wheelspin, eliminating torque steer and snatching in front wheel drive cars compared to conventional LSD units, and a maintenance-free design which retains the standard oil lubrication.

Available for any M32 gearbox: Astra VXR (Z20LEH), Astra 1.9 CDTi, Astra H 2.0 Turbo (Z20LEL/Z20LER), Astra H 1.6 Turbo (Z16LET), Corsa VXR (Z16LER), Corsa D SRi 1.6 Turbo (Z16LEL)

LSD Retail £774.00 Special Price - £Check Shop. Outer Diff Bearings £49.80 per pair (with LSD). Buy Now Click Here!
In House Fitting Available (with gearbox in situ).



M32 ATB LSD Fitting

Application Price
Nova/Corsa B/Astra F/Cavalier/Calibra - F16/F18/F20/F28 2wd Buy Now Click Here! £672
Nova/Corsa B - F10/F13/F15/F17 £672
Astra G/Vectra B - F23* Buy Now Click Here! £774 £708
Cavalier/Calibra/Vectra B V6 - F25 £774 Special Order Only
Cavalier/Calibra F28 4x4 (Front) £672
Cavalier/Calibra F28 4x4 (Rear) £672
VX220/Speedster - F23* (RWD version) Buy Now Click Here! £708
Astra/Zafira 2.0 T VXR - M32* Buy Now Click Here! £774 £714
Astra H 1.9 CDTi/2.0 Turbo Petrol/1.6 Turbo - M32* Buy Now Click Here! £774 £714
Corsa D 1.6 T VXR - M32* Buy Now Click Here! £774 £714
Corsa D 1.6 T SRi - M32* Buy Now Click Here! £774 £714
Meriva 1.6 T VXR - M32* Buy Now Click Here! £774 £714
Vectra C inc VXR - F40* Buy Now Click Here! £774 £720
* Note: M32 LSD's will require additional diff bearings to allow fitment which we can supply - £49.80 per pair when supplied with LSD.
F23 and F40 Outer Diff Bearings Also Available.
Please call us with any queries or for LSD's not listed for online purchase.

CV Boots and CV Joints

Don't forget we also sell CV Boot Kits and CV Joints for F23 and M32 applications

Buy Now Click Here!

Gearbox Oil - Fully Synthetic

For manual gearboxes used in Vauxhall/Opel applications, such as the M32/F23/F40/F20/F28, we recommend a change to a fully synthetic gearbox oil for all manual transmissions that are in good condition. This applies to standard gearboxes and those fitted with a limited slip differential.

Millers CRX NT+ 75W-90 Gear Oil

Millers Oils CRX 75w-90 NT+ Competition Full Synthetic Transmission Oil (2017)

Competition fully synthetic transmission oil is a blend of full synthetic base oils incorporating new “Nano Technology” additive chemistry to significantly reduce internal frictional and power losses. Competition grade transmission oils which are available in various viscosities and are formulated using a unique combination of improved chemistry and lower friction NANODRIVE additives to massively reduce friction vs a standard oil.

Designed for the lubrication of competition gearboxes. Manual transmissions, synchromesh, non-synchromesh, sequential gearboxes, transfer gearboxes, transaxles and hypoid differentials without limited slip which require API GL4 or GL5 performance.
Recommended for modern transmissions where full synthetic oil is specified, especially for high performance road and track day applications. Hewland, Xtrac, Glebe Transmissions, ZF, Tran X, Elite Transmissions. For M32, F40, F23 gearboxes with standard or geared type LSD such as Wavetrac and Quaife
  • Exceptional cold flow properties for easier gear changes.
  • Fast lubrication flow to component extremes on start up
  • Very good oxidation resistance and superior thermal stability. Low friction/ low drag formulation to help reduce operating temperatures.
  • High film strength for maximum component protection. Significantly reduces friction, temperature, wear and minimises power loss.
  • Laboratory tests and results show up to a further 15% reduction in friction and up to a further 17% reduction in wear over the previous award winning NT range
Note: Does not contain friction modifiers. For plate type Limited Slip differentials (Drexler F40 Astra J, M32 Corsa Nurburging) use CRX LS 75w90 NT.

Buy Now Click Here!

© Copyright Courtenay Sport Ltd


Courtenay Sport Vauxhall Tuning
Courtenay Sport
 Vauxhall Tuning

Courtenay Sport - Find us on Facebook

Courtenay Sport - Follow us on Twitter
Latest News
Shopping Basket
Your Basket is Empty.
0Items in Basket:
Top Questions
Popular Products
Sale Items
Our website has been checked with most popular browsers. We advise using the latest version of your preferred browser.

About Us :: Privacy/Use of Cookies :: Credit Card Security :: FAQ :: Contact Us

© Copyright Courtenay Sport Ltd. Designed by Courtenay Sport Ltd
Find Courtenay Sport on Facebook

Switch to our Mobile Version