Wavetrac by Autotech

BMW F-Series M rear traction upgrade - Wavetrac ATB helical differential

Unlock real-world grip, cleaner corner exits and quicker throttle application with the Wavetrac torque-biasing rear diff for F-series M cars. Built in the USA by Autotech Driveline, this helical gear unit is the only ATB on the market with a patented internal mechanism that continues to drive when one wheel is light or unloaded. Ideal for fast road, track days and spirited driving, it delivers consistent, confidence-inspiring performance that transforms the way your BMW puts power down.

We run Wavetrac units on our own builds, and our customers repeatedly report calmer on-limit behaviour, stronger acceleration off apexes and rock-solid stability in mixed conditions. If you are replacing the factory electronic rear diff and want predictable traction without the heat fade or inconsistency, this is the go-to solution.

Why this upgrade works

• Patented cam device keeps torque flowing during zero-axle-load moments for drive where other gear-type units go open.
• Smoother delivery than the stock electronically controlled rear unit when pushed hard, especially as temperatures rise.
• Faster exits, better mid-corner balance and repeatable lap-after-lap performance on road and circuit.
• 9310 gear steel internals and case-hardened housings with ARP hardware for long-term durability.
• Transferable lifetime warranty, including competition use.

Technical highlights

• Helical gear ATB design - no clutch packs to wear or chatter.
• Unique Wavetrac mechanism adds drive under low or lifted wheel load.
• Precision machined housings, premium fasteners and proven materials specification.
• Designed and manufactured by Autotech Driveline in the USA.
• Coding or calibration required when replacing the factory 210mm electronic rear unit.

Vehicle applications - 210mm electronic rear unit replacement

• BMW M2 F87 - including M2 and M2 Competition
• BMW M3 F80
• BMW M4 F82 Coupe and F83 Convertible
• BMW M5 F10
• BMW M6 F13

For cars equipped with the 210mm electronic rear differential. Coding or software changes will be required after installation.

Part number

30.309.160WK

Real-world feedback

Drivers consistently note stronger traction out of tight hairpins, better stability over kerbs and a more connected rear axle in wet or bumpy conditions. We have installed and used this unit ourselves and the improvement in drive out of corners is immediately noticeable.

Installation and setup

Professional fitting is recommended. MJ Modifications in Warwickshire can supply, install and handle the required coding for F-series M vehicles. For a tailored quotation and lead time, email info@mjmodifications.co.uk.

Compatibility check

We verify fitment before dispatch. Please provide your UK registration or the last 7 digits of your VIN at checkout so we can confirm suitability for your axle.

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