BMW E46 188K Disc Limited Slip Differential (LSD)
We recommend their use exclusively for competition.
Our Disc LSDs (Limited Slip Differentials) are made of forged chrome-nickel steel and undergo special heat treatments, such as Super Sub-Zero or cryogenic treatment.
In addition, they undergo processes such as shot peening and WPC to reinforce the strength of the core and surface, increase wear resistance, and extend their service life. The high-strength material, along with the processes and treatments employed, not only minimizes friction and improves fatigue resistance, but also contributes to a significant reduction in overall weight and improved internal lubrication thanks to the use of large windows and multiple holes.
As a result, our LSDs offer increased durability (on average, they are maintenance-free for the first 2,000 km of special stages) and improved, stable performance.
Technical Specifications:
These plate LSDs are distinguished by being the only product on the market with a 20-friction disc design. They also have the advantage of being the lightest on the market, weighing only 6.7 kg. These features contribute to improved traction and consistent performance, with stable preload over time, even in endurance racing.
As with all our plate LSDs, we use dual-ramp bodies, and our factory-fitted version for this application is 35/67.5 and 35/90 degrees. Other ramp angles are available upon request.
We include a free set of crown/ring gear bolts, made of high-strength grade 12.9 steel, along with an extra-thick Belleville/conical washer for those who wish to experiment with higher preload values.
As a testament to our quality and reliability, we offer a one-year racing warranty against material or manufacturing defects on our entire range of plate LSDs.
IMPORTANT Reminder:
We recommend using gear oils with anti-shock additives or friction modifiers, commonly referred to as "LS" (limited-slip) gear oils, specifically for disc LSDs.
The most common SAE grade is 75W-140 LS, and only LS specifications if a disc LSD is installed.
It is also recommended to add gear oil directly to the LSD during installation in the gearbox.
Please note that although we apply anti-rust oil during assembly at our factory, it does not provide lubrication.