E9X M3 (6-speed Manual) Diffsonline Custom Performance Differential

bmw e9x m3,There are a number of limited-slip carrier upgrades for the bmw e9x m3 but they fall into two groups – clutch and helical. For purely street use we would recommend a helical such as Wavetrac or the in-house Diffsonline carrier. Helical diffs offer advantages in wear resistance and performance over traditional clutches. Torque transfer happens instantly and it doesn’t need to sense a spinning wheel first. Lock-up is quicker and smoother and it’s less affected by heat than a clutch. The only downside is potentially higher gear whine (but not in all cases). Some street 2 and 3-disc street clutch options have been discontinued due to the dwindling supply of original BMW cores.

Our bmw e9x m3 options are designed around serious track or race use since they can be easily customized around car setup and driving style. These diffs feature multiple clutch and spring discs – more clutches equal greater capacity for torque and heat management. Custom ramp angles are machined into the carrier to dictate lockup behavior under acceleration and deceleration (coast). Lower values equal a more aggressive lock-up. Our clutch options are generally not for street use except in highly-modified cars that need the extra traction.

The bmw e9x m3 Variable viscous diff uses plates and heavy fluid to transfer torque between axles. When new and fresh the system works quite well for street use. However, it is out-performed by traditional clutch differentials on the track and loses performance and refinement within 60,000 miles.

Full Race LSD carrier – This carrier is a wish list come true for differential features. Up to 10 clutch discs are used with preload set by coil springs instead of spring plates that are affected by wear. As with any racing part, weight is the enemy and Diffsonline reduces mass by over 25%. Engagement is set by single-driven ramps – aggressive engagement on acceleration but none or very little on deceleration. This is known as a 1-way limited slip and the zero lockup under braking and mid-corner coasting means very little lock-up is pushing you into understeer. The Race carrier option is designed only for race and track use – it will be noisy and unrefined for street use and no warranty is offered.bmw e9x m3

The OS Giken is a multi-clutch design that is recommended only for track use and no warranty is provided.

Definitely contact us by phone or email to discuss the best E90/E92 M3 diff upgrade that will meet your needs.