Quaife QDF14N BMW 188L ATB Helical Gear LSD
Info
- Type Helical Gear Limited Slip Differentials
- Brand Quaife
- SKU MLR.DBH
- MPN QDF14N
- Sizing Chart Download
- Quaife Automatic Torque Biasing (ATB) limited slip differential
- Compatible with traction control and ABS systems
- Controlled power supply to driven wheels
- Direct replacement for factory diff
- Backed by a Quaife lifetime warranty
*Please leave the last 7 digits of the VIN in the 'Order Special Instructions' box in your cart*
Medium case 188mm (29.5mm offset) 10 bolt crown wheel differential - most commonly used in 4 cylinder models
Suitable For:
- E81 118d manual
- E82 120d manual
- E87 116d manual; 120d auto up to 01/2007; 120d manual
- E46 320d auto; 320d manual (2.79:1 ratio); 323i manual; 328i; 330i manual; 330xd
- E90 318d; 320d manual (7566218 & 7566274 diff); 325d; 330d; 325i manual (7566172 diff); 330dx auto
- E92 320d; 325d; 330d; 325i manual (7519942 diff); 330dx auto
- E39 520d manual; 525d auto; 525i manual; 528i manual; 530i manual; 535i; Alpina B10 3.2 manual (2.93:1 ratio) / Alpina B10 3.3 manual
- E60 520d manual; 525d auto after 03/2007; 530i manual
- E83 X3 3.0d manual rear axle
- F25 X3 SDrive 2.0d rear axle
- E53 X5 3.0d manual rear axle
- E85 Z4 2.2i manual; 3.0i manual; 3.0i SMG
Quaife Helical LSD's - How They Work
Often imitated but never improved, the Quaife Automatic Torque Biasing (ATB) limited slip differential is the perfect traction solution that delivers noticeable performance benefits on any car using a factory ‘open’ differential unit
Once installed, drivers will notice an immediate difference, as the Quaife (ATB) limited slip differential automatically biases the torque across the axle to the wheel with the most grip. Unwanted wheelspin and slip are greatly reduced, resulting in less understeer on the front or four-wheel drive machines and reduced oversteer on rear-wheel drive vehicles. Rear-wheel drive cars with a Quaife limited slip differential become more controllable during oversteer moments, enabling drivers to exploit the full potential of their machines for the first time, leading to a more exciting, rewarding and rapid driving experience
Fully compatible with manufacturer electronic traction control and anti-lock braking systems, the Quaife ATB differential offers a number of key advantages in both functionality and service life compared to conventional plate-style LSD units
The Benefits Are:
- Safe, progressive and seamless in action, the Quaife ATB differential never ‘locks’
- Controlled power is transmitted to all driven wheels, to maximise traction and minimise wheelspin, particularly in slippery conditions
- Fitment greatly reduces unwanted torque steer, understeer or oversteer
- Designed to work in harmony with road car electronic stability and traction control programs
- Improves braking performance on front-wheel drive cars by reducing lock-up and minimising ABS intrusion due to torque transfer action
- Reduces tyre wear, especially on front-wheel drive cars
- Gear operated with no service components to replace – ever
- Direct replacement for factory standard ‘open’ differential unit
- Retains normal axle lubrication systems and maintenance schedule
- Over 100,000 units sold worldwide since the 1980’s
- Available for over 400 different applications
- Backed by a Quaife lifetime warranty for both motorsport and road use
Designed for Motorsport use, no instructions included
- There are no special parts required to install a Quaife ATB Differential, beyond what may normally be needed to install a stock unit. The basic parts needed will be differential bearings, transmission or rear end gaskets and possibly some shims if required.
- When running a Quaife ATB Differential in a standard transaxle gearbox, we recommend you use the oil recommended by your vehicle’s manufacturer – the Quaife ATB Differential does not require any special lubricants
- We recommend that the axle oil is changed after the first 500 miles as initially, they can create swarf - this is normal and will reduce with use
- This is a torque-biasing helical gear limited slip differential - not a plate type, viscous coupling or clutch pack differential. Quaife does not specify torque bias ratio details. The Quaife ATB differential is an all-helical gear design. The angle and tooth form of the helix used, the number of pinions used and many other factors, (including the individual vehicle application in question), all contribute to how the differential behaves and biases torque across an axle
- All of Quaife’s products are precision manufactured from certified steel billets and inspected to ISO9001-2008 standards in Britain
Includes assembled differential unit only. Bearings, gears, gaskets/seals etc are not included
Domestic Shipping:
All Quaife LSD's have a 1 to 3 UK business days shipping time.
For more info on shipping service see our shipping policy
At Matt Lewis Racing we want you to be completely satisfied with your purchase. If you’re unhappy with your purchase, please contact us immediately. We will first attempt to resolve your issue with the purchase or alternatively offer a refund or exchange in accordance with the below policy:
UK and EU Customers:
Under UK and EU consumer law you have the right to a refund of the purchased goods within 30 days. Within the 30 day period a refund or exchange will be conditional on the product and its packaging being returned in its original condition. You will be responsible for the postage cost of returning the goods
If the product is received by you, the consumer in a defective or damaged state we will offer a full refund or exchange. Photographic evidence will be required. The product will need to be returned before a refund or exchange can be processed
All returns MUST be authorised by us in advance
Customers Outside the UK & EU:
Customers outside the UK and EU are subject to the laws and regulations of their respective countries. We will comply with any applicable laws and regulations regarding returns, refunds, and exchanges. Please contact us for more information on returns and refunds outside of the UK and EU
Exchanges:
If you would like to exchange a product, please contact us with your order number and details of the product you would like to exchange. We will be happy to arrange an exchange for you, subject to availability
Refunds:
If you would like a refund, please contact us with your order number and details of the product you would like to return. We will process your refund within 48 hours of receiving the returned product. Please note that we will not be able to issue a refund until we have received the returned product
Exceptions:
Please note that certain products may be exempt from our refund and exchange policy. These include custom-made products, special orders, and products that have been used or damaged
If you have any questions or concerns about our refund and exchange policy, please do not hesitate to contact us. We believe that our customers should be completely satisfied with their purchase and will do our best to address your concerns