{"product_id":"wavetrac-limited-slip-differential-bmw-188k-axle-3-15-final-drive-e46-325i-328i-330i-auto-e9x-325i-328i-330i-e8x-128i-bolted-ring-gear-rear","title":"Wavetrac Limited Slip Differential - BMW 3 Series (E46\/E9X) \/ 1 Series (E8X) \/ 5 Series (E60) - 188K Axle Rear 3.15+ Ratio","description":"\u003ch2\u003eWavetrac Limited Slip Differential - BMW 3 Series (E46\/E9X) \/ 1 Series (E8X) \/ 5 Series (E60) - 188K Axle Rear 3.15+ Ratio\u003c\/h2\u003e\n\u003cp\u003eThe Wavetrac is a helical gear, torque-biasing limited slip differential that directly replaces the factory differential in the BMW 188K rear axle (3.15+ final drive) of the E46 and E9X 3 Series, E8X 1 Series, E60 5 Series and Z4. Unlike conventional helical LSDs, Wavetrac's patented design keeps driving the wheel with grip even when the other wheel is unloaded or in the air - where other helical diffs behave like an open diff. There are no clutch packs to wear, adjust or rebuild.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Final drive ratio must be 3.15 or higher. Also suits the Z4 2.5i and 3.0i. Suits axles with a bolted ring gear; some E9X, E8X, E60 and Z4 axles have a factory-welded ring gear, which needs machining and a separate installation kit. Needs ARP ring gear bolt kit N.M12.150.24K.\u003c\/p\u003e\n\u003ch3\u003eFitment \u0026amp; Identification\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eE46 325i, 328i, 330i automatic 1998-2005 - bolted ring gear\u003c\/li\u003e\n\u003cli\u003eE9X 325i, 328i, 330i 2006+ - some ring gears may be welded\u003c\/li\u003e\n\u003cli\u003eE9X 335i automatic 09\/2007+ - some ring gears may be welded\u003c\/li\u003e\n\u003cli\u003eE8X 135i automatic 2008+ - some ring gears may be welded\u003c\/li\u003e\n\u003cli\u003eE8X 128i 2008+ - some ring gears may be welded\u003c\/li\u003e\n\u003cli\u003eE60 525i, 528i, 530i automatic - some ring gears may be welded\u003c\/li\u003e\n\u003cli\u003eZ4 2.5i, 3.0i - some ring gears may be welded\u003c\/li\u003e\n\u003cli\u003eAxle: BMW 188K\u003c\/li\u003e\n\u003cli\u003eFinal drive ratio must be 3.15+ - check the ratio stamped on your diff or in your vehicle build data\u003c\/li\u003e\n\u003cli\u003eWelded OEM ring gear assemblies need machining and an installation kit (sold separately)\u003c\/li\u003e\n\u003cli\u003ePosition: Rear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ePlease confirm your gearbox or axle code, final drive ratio and model year before ordering. If you are unsure, send us your VIN and gearbox\/axle code and we will confirm fitment.\u003c\/p\u003e\n\n\u003ch3\u003eWhat You'll Also Need\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour factory ring gear, transferred from the original differential\u003c\/li\u003e\n\u003cli\u003eARP ring gear bolt kit for BMW 188K \/ 215K axles (N.M12.150.24K, 10pc - torque 80 ft-lb with red Loctite)\u003c\/li\u003e\n\u003cli\u003eNew carrier bearings are recommended when the differential is changed\u003c\/li\u003e\n\u003cli\u003eGear oil to factory specification (see below)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cp\u003eInstallation by a professional driveline specialist is always recommended. The ring gear is transferred to the Wavetrac and backlash and bearing preload are set to factory specification. No break-in is required for the Wavetrac itself - follow the break-in procedure only if a new ring and pinion is fitted at the same time.\u003c\/p\u003e\n\u003ch3\u003eGear Oil\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUse the gear oil specified by your vehicle manufacturer - the Wavetrac is compatible with virtually all factory-fill gear oils\u003c\/li\u003e\n\u003cli\u003eAvoid gear oils with limited slip (friction modifier) additives - they reduce the friction a helical differential relies on\u003c\/li\u003e\n\u003cli\u003eDo NOT use Red Line ShockProof or similar oils - this voids the Wavetrac warranty\u003c\/li\u003e\n\u003cli\u003eFor racing, Wavetrac recommends Motul synthetic high-performance gear oils\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eStrength \u0026amp; Maintenance\u003c\/h3\u003e\n\u003cp\u003eWavetrac differentials use high-strength 9310 alloy steel gears in case-hardened billet or forged steel housings, assembled with ARP fasteners. In almost any gearbox or axle, the Wavetrac is not the limiting factor in torque capacity. There is no scheduled maintenance and no rebuilds are required.\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003eWavetrac limited lifetime warranty against defects in manufacture, material, workmanship and wear-out, when used in the application it was designed for - including racing - and transferable to subsequent owners. Excludes differentials that are incorrectly installed, fitted to the wrong application, modified, or run in ShockProof-type oil. Proof of purchase from an authorised Wavetrac dealer is required.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: Helical gear torque-biasing limited slip differential\u003c\/li\u003e\n\u003cli\u003ePosition: Rear\u003c\/li\u003e\n\u003cli\u003eGearbox \/ axle: BMW 188K\u003c\/li\u003e\n\u003cli\u003eDrivetrain: RWD\u003c\/li\u003e\n\u003cli\u003eFinal drive ratio: 3.15+\u003c\/li\u003e\n\u003cli\u003eRing gear: Bolted (welded needs machining + install kit) - M12 bolts (N.M12.150.24K, 80 ft-lb)\u003c\/li\u003e\n\u003cli\u003eGears: 9310 high-strength alloy steel\u003c\/li\u003e\n\u003cli\u003eHousing: Case-hardened billet or forged steel\u003c\/li\u003e\n\u003cli\u003eFasteners: ARP\u003c\/li\u003e\n\u003cli\u003eMaintenance: Maintenance free — no rebuilds required\u003c\/li\u003e\n\u003cli\u003eWarranty: Wavetrac limited lifetime warranty\u003c\/li\u003e\n\u003cli\u003eMade in: USA\u003c\/li\u003e\n\u003cli\u003ePart number: 30.309.175WK\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNeed help confirming the right Wavetrac for your car? Contact our team at \u003ca href=\"mailto:sales@chicaneaustralia.com.au\"\u003esales@chicaneaustralia.com.au\u003c\/a\u003e.\u003c\/p\u003e","brand":"Wavetrac","offers":[{"title":"Default Title","offer_id":53896436482341,"sku":"30.309.175WK","price":2975.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0918\/2943\/6709\/files\/WTC_BMW_30.309.176WK_743ddfb7-27c5-4693-9417-492c9211fe9f.webp?v=1790283557","url":"https:\/\/www.chicaneaustralia.com.au\/products\/wavetrac-limited-slip-differential-bmw-188k-axle-3-15-final-drive-e46-325i-328i-330i-auto-e9x-325i-328i-330i-e8x-128i-bolted-ring-gear-rear","provider":"Chicane Australia","version":"1.0","type":"link"}