Transform the driving dynamics of your BMW with the Wavetrac ATB Limited Slip Differential (LSD) Built Differential (3.15 Final Drive), designed for F2X, F3X and F4X platforms. This complete differential solution delivers exceptional traction, improved power delivery and enhanced control, making it one of the most effective upgrades for both daily-driven and high-performance BMW builds.
Features:
-
Complete built differential with Wavetrac ATB LSD installed
-
Designed for BMW F20/F21/F22/F30/F31/F32/F33/F34/F36 platforms
-
3.15 final drive ratio
-
Advanced torque-biasing technology for maximum traction
-
Eliminates common limitations of factory open differentials
-
Precision-built for durability, reliability and consistent performance
Why Upgrade to a Wavetrac LSD?
Most modern BMW models are equipped with open differentials, which can limit traction under acceleration—particularly in wet conditions or higher-powered applications. The Wavetrac ATB LSD solves this by intelligently distributing torque between the rear wheels, providing:
-
Improved traction during acceleration
-
Increased stability when exiting corners
-
More predictable and controlled power delivery
-
Enhanced overall driving engagement
Unlike traditional LSDs, Wavetrac’s patented design maintains drive even when one wheel loses traction completely, ensuring consistent performance in all conditions.
Advanced Wavetrac Technology
Wavetrac’s ATB (Automatic Torque Biasing) differential is widely regarded as one of the most advanced systems available, featuring:
-
Patented load-sensing technology
-
Smooth, maintenance-free operation (no clutch packs)
-
Seamless integration with BMW traction control systems
-
Long-term durability without performance degradation
Built Differential Solution – No Downtime Hassle
BMW differentials from this generation are typically friction-welded, making LSD installation complex and time-consuming. This solution removes that challenge by supplying a fully built axle with Wavetrac LSD installed, eliminating the need for lengthy vehicle downtime.
Each unit is professionally:
-
Deconstructed and machined
-
Prepared with drilled and tapped ring gear
-
Assembled with precision tolerances
-
Quality checked prior to dispatch
Available Build Options
-
Customer Axle Build:
Your supplied axle is modified and rebuilt with a Wavetrac LSD (subject to condition) -
Sourced Axle Build:
A suitable used axle is sourced, rebuilt and supplied with LSD installed -
Brand New BMW Axle Build:
A brand new BMW axle is supplied and upgraded with a Wavetrac LSD
All axles are supplied dry and must be filled with the correct oil before installation.
Compatibility – BMW Models (3.15 Final Drive)
1 Series (F20 / F21)
118dX, 120d, 120dX
2 Series (F22)
218d
3 Series (F30 / F31 / F34 GT)
316d, 320d, 320dX, 320iX, 328i, 328iX, 335i, 335iX, 340i
4 Series (F32 / F33 / F36)
420d, 420dX, 428i, 428iX, 435i, 435iX, 440i
Compatible with vehicles using 3.15 final drive axles (e.g. BMW part numbers 33107603748 / 33107603749).
Important:
Axle specifications can vary depending on model, trim and market. Please provide your VIN before or after purchase so our team can confirm compatibility and ensure the correct unit is supplied.
Why Choose Wavetrac?
Wavetrac differentials are trusted globally for their ability to deliver consistent, reliable performance without compromise. Their innovative design sets them apart from traditional LSD systems, offering:
-
Superior traction in all driving conditions
-
No maintenance requirements associated with clutch-type LSDs
-
Proven durability across road and high-performance applications
Why Buy from R44 Performance?
R44 Performance supplies high-quality BMW drivetrain upgrades backed by expert knowledge and global support.
-
Specialist BMW performance parts supplier
-
Expert fitment and compatibility support
-
Worldwide shipping available
-
Trusted by enthusiasts and performance builds
Upgrade your BMW’s traction, control and driving experience with the Wavetrac ATB LSD Built Differential (3.15 Final Drive)—a proven solution for unlocking the full potential of your drivetrain.