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WaveTrac Limited Slip Differential - BMW 335i E9X (Axle Welded Ring Gear / 07-11')


Designed from a clean sheet, the new Wavetrac Differential brings current gear technology to the market. Internally, its gear tooth forms are optimized for strength and improved oil film retention over competitive designs. Our gear package is smaller, reducing overall mass, yet is more durable. Attention was also paid to the side gear/axle interface, putting as much material thickness as possible in this critical area - most important when power levels get high. Each Wavetrac Differential is crafted from the highest quality materials available. The internal gears are made from high strength 9310 alloy steel. The diff bodies are machined from case hardened steel billet. To complete the package, every Wavetrac differential is built exclusively using high quality, high strength fasteners from ARP, the world leader in fastener technology.

Since March, 2007 production, BMW has fitted rear axles where the ring gear is welded to the differential carrier. WaveTrac Install Kits, combined with precision machinework, allow fitment of a Wavetrac differential in late-model BMW rear axles where the ring gear is factory welded to the standard differential.

Upon receipt of a customer's differential/ring gear assembly, the ring gear is separated from the stock carrier using CNC equipment. The ring gear is then machined, drilled and threaded to allow bolt mounting to a new Wavetrac differential.We then return to the customer:

  • Wavetrac Differential
  • Customer's machined ring gear
  • Precision-ground spacer ring (where required)
  • Set (10) of custom, high strength ARP ring gear bolts

For the best possible performance, disassembly of the stock axle, and fitment of the Wavetrac and Install Kit should be performed by one of our Specialist Dealers. This ensures that the condition of the axle can be assessed before modifications are performed, and that the re-assembly is done professionally - ensuring correct gear backlash and bearing end play.

      Tags: 2007 , 2008 , 2009 , 2010 , 2011 , 335d , 335dx , 335i , 335is , 335xi , BMW