ATB Helical Limited Slip Differential

The Quaife QDF27B is an Automatic Torque Biasing (ATB) Helical Limited Slip Differential, specifically designed as a high-performance upgrade for Mercedes-Benz vehicles equipped with the HAG 215 axle. This differential is a direct replacement for the factory standard open differential, offering a significant improvement in traction and handling. Manufactured in Great Britain to ISO9001-2008 standards, it comes with a lifetime warranty covering both road and motorsport applications. This design is known for greatly reducing unwanted torque steer, understeer, or oversteer, leading to a more stable and predictable driving experience. Unlike other limited-slip differential designs, the Quaife ATB utilizes a proven system of helical gears, eliminating the need for service components like clutches, ramps, or springs, and requires only standard transmission oils. It can also improve braking performance, particularly on front-wheel-drive cars, by reducing lock-up and minimizing ABS intrusion through its torque transfer action. The unit never locks, ensuring a safe, progressive, and seamless operation. This specific model, the QDF27B, is listed for Mercedes-Benz w204 C63 and w205 C63/C63s AMG models. It is also stated to fit other AMG models, though customers are advised to contact Kevin Bird Garages for confirmation. The product requires confirmation of application using the attached technical drawing before purchase.