{"product_id":"wavetrac-atb-lsd-lukkopera-bmw-e9x-335i-215k-weld-r-3-08","title":"Wavetrac ATB LSD Differential - BMW E9X 335i (215K Weld) r=3.08","description":"\u003ch2 data-start=\"177\" data-end=\"239\"\u003e \u003cstrong data-start=\"179\" data-end=\"237\"\u003eWavetrac ATB Locking Differential for BMW (215K)\u003c\/strong\u003e\n\u003c\/h2\u003e\n\n\u003ch3 data-start=\"240\" data-end=\"281\"\u003e \u003cstrong data-start=\"244\" data-end=\"279\"\u003eGear ratio r = 3.08 → BMW E9X 335i\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-start=\"282\" data-end=\"329\"\u003e \u003cstrong data-start=\"282\" data-end=\"329\"\u003e(Welded Ring Gear)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp data-start=\"331\" data-end=\"709\"\u003e Simply put, \u003cstrong data-start=\"358\" data-end=\"428\"\u003eWavetrac is the only gear-based differential on the market\u003c\/strong\u003e that \u003cstrong data-start=\"435\" data-end=\"510\"\u003edoes not lose traction when another axle is lightened or loses load\u003c\/strong\u003e . Axle load can be lost during aggressive driving, cornering on the track, over curbs or on extremely slippery surfaces – and this happens more often than many people realize.\u003c\/p\u003e\n\n\u003ch2 data-start=\"716\" data-end=\"751\"\u003e \u003cstrong data-start=\"719\" data-end=\"751\"\u003eWhy is Wavetrac different?\u003c\/strong\u003e\n\u003c\/h2\u003e\n\n \u003cp data-start=\"753\" data-end=\"916\"\u003eWe won't go into torque split ratios or the theory of ATB differentials here. Let's focus on \u003cstrong data-start=\"860\" data-end=\"915\"\u003ehow Wavetrac affects performance in practice\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003ch3 data-start=\"918\" data-end=\"990\"\u003e \u003cstrong data-start=\"922\" data-end=\"990\"\u003eStandard gear lock (OEM, Quaife, Torsen, Truetrac, etc.)\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n\u003cp data-start=\"991\" data-end=\"1299\"\u003e Let's imagine you're at track day and while cornering, the inside rear wheel bounces over a curb. This is completely normal in track driving. The problem is that \u003cstrong data-start=\"1145\" data-end=\"1229\"\u003ethe momentarily lightened wheel causes the other wheel to lose traction\u003c\/strong\u003e . Sprocket locks require load on both axles to work.\u003c\/p\u003e\n\n\u003cp data-start=\"1301\" data-end=\"1319\"\u003e As a result: \u003c\/p\u003e\n\n\u003cul data-start=\"1320\" data-end=\"1446\"\u003e\n\n\u003cli data-start=\"1320\" data-end=\"1350\"\u003e\n\n\u003cp data-start=\"1322\" data-end=\"1350\"\u003e the draw is momentarily interrupted \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1351\" data-end=\"1388\"\u003e\n\n\u003cp data-start=\"1353\" data-end=\"1388\"\u003e power is not transmitted to the gripped wheel \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1389\" data-end=\"1446\"\u003e\n\n\u003cp data-start=\"1391\" data-end=\"1446\"\u003e the exit from the curve is uneven and unpredictable\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch3 data-start=\"1448\" data-end=\"1481\"\u003e \u003cstrong data-start=\"1452\" data-end=\"1481\"\u003eSame situation with Wavetrac\u003c\/strong\u003e\n\u003c\/h3\u003e\n\n \u003cp data-start=\"1482\" data-end=\"1709\"\u003eWavetrac's \u003cstrong data-start=\"1493\" data-end=\"1535\"\u003epatented cam device\u003c\/strong\u003e prevents loss of traction when one wheel becomes loose. The mechanism \u003cstrong data-start=\"1604\" data-end=\"1645\"\u003ecreates an internal load in the differential\u003c\/strong\u003e , compensating for the lost traction, and directs torque to the holding wheel.\u003c\/p\u003e\n\n\u003cp data-start=\"1711\" data-end=\"1721\"\u003e Result: \u003c\/p\u003e\n\n\u003cul data-start=\"1722\" data-end=\"1857\"\u003e\n\n\u003cli data-start=\"1722\" data-end=\"1774\"\u003e\n\n\u003cp data-start=\"1724\" data-end=\"1774\"\u003e smoother and more continuous power transfer when cornering \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1775\" data-end=\"1801\"\u003e\n\n\u003cp data-start=\"1777\" data-end=\"1801\"\u003e better output speed \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1802\" data-end=\"1832\"\u003e\n\n\u003cp data-start=\"1804\" data-end=\"1832\"\u003e more predictable drivability \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1833\" data-end=\"1857\"\u003e\n\n\u003cp data-start=\"1835\" data-end=\"1857\"\u003e faster lap time\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003ch2 data-start=\"1864\" data-end=\"1879\"\u003e \u003cstrong data-start=\"1867\" data-end=\"1879\"\u003eAdditional benefits\u003c\/strong\u003e \u003c\/h2\u003e\n\n\u003cul data-start=\"1881\" data-end=\"2525\"\u003e\n\n\u003cli data-start=\"1881\" data-end=\"2125\"\u003e\n\n\u003cp data-start=\"1883\" data-end=\"2125\"\u003e \u003cstrong data-start=\"1883\" data-end=\"1934\"\u003ePatented carbon fiber bias plate for pinions\u003c\/strong\u003e\u003cbr data-start=\"1934\" data-end=\"1937\"\u003e In other gear locks, the pinions rotate directly in the frame, causing friction and locking efficiency to change over time. In Wavetrac, performance remains consistent throughout its life. \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2127\" data-end=\"2299\"\u003e\n\n\u003cp data-start=\"2129\" data-end=\"2299\"\u003e \u003cstrong data-start=\"2129\" data-end=\"2165\"\u003ePatented Wave Profile construction\u003c\/strong\u003e \u003cbr data-start=\"2165\" data-end=\"2168\"\u003eEliminates the near-zero-load traction loss that occurs in all other ATB-type differentials. \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2301\" data-end=\"2392\"\u003e\n\n\u003cp data-start=\"2303\" data-end=\"2392\"\u003e \u003cstrong data-start=\"2303\" data-end=\"2330\"\u003eARP bolts throughout\u003c\/strong\u003e\u003cbr data-start=\"2330\" data-end=\"2333\"\u003e Excellent strength and reliability even in heavy use. \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2394\" data-end=\"2476\"\u003e\n\n\u003cp data-start=\"2396\" data-end=\"2476\"\u003e \u003cstrong data-start=\"2396\" data-end=\"2428\"\u003e9310 steel gears\u003c\/strong\u003e\u003cbr data-start=\"2428\" data-end=\"2431\"\u003e Machined or forged steel frame in use. \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2478\" data-end=\"2525\"\u003e\n\n\u003cp data-start=\"2480\" data-end=\"2525\"\u003e \u003cstrong data-start=\"2480\" data-end=\"2525\"\u003eDesigned and manufactured in the USA\u003c\/strong\u003e\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"2527\" data-end=\"2580\"\u003e \u003cstrong data-start=\"2527\" data-end=\"2580\"\u003eWAVETRAC: Smooth is Fast – Smooth is speed.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch2 data-start=\"2587\" data-end=\"2627\"\u003e \u003cstrong data-start=\"2590\" data-end=\"2627\"\u003eIdeal for street and track riding\u003c\/strong\u003e\n\u003c\/h2\u003e\n\n\u003cp data-start=\"2629\" data-end=\"2869\"\u003e Wavetrac is ideal for \u003cstrong data-start=\"2661\" data-end=\"2695\"\u003ehigh-performance street cars\u003c\/strong\u003e that are also used on the track. It is highly durable, yet \u003cstrong data-start=\"2765\" data-end=\"2799\"\u003eunobtrusive in normal driving\u003c\/strong\u003e – and does not interfere with stability or traction control systems.\u003c\/p\u003e\n\n \u003cp data-start=\"2871\" data-end=\"2907\"\u003eOn the track and in fast street driving: \u003c\/p\u003e\n\n\u003cul data-start=\"2908\" data-end=\"3069\"\u003e\n\n\u003cli data-start=\"2908\" data-end=\"2947\"\u003e\n\n\u003cp data-start=\"2910\" data-end=\"2947\"\u003e both wheels drive efficiently \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"2948\" data-end=\"3021\"\u003e\n\n\u003cp data-start=\"2950\" data-end=\"3021\"\u003e no understeer or “pushing” like in clutch-locked rear axles \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"3022\" data-end=\"3069\"\u003e\n\n\u003cp data-start=\"3024\" data-end=\"3069\"\u003e drivability remains neutral and controlled\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"3071\" data-end=\"3230\"\u003e Wavetrac outperforms other gear locks because \u003cstrong data-start=\"3119\" data-end=\"3176\"\u003eit does not lose traction when one axle becomes light\u003c\/strong\u003e – a situation that is common on the track and in hard driving.\u003c\/p\u003e\n\n\u003ch2 data-start=\"3237\" data-end=\"3279\"\u003e \u003cstrong data-start=\"3240\" data-end=\"3279\"\u003eSmooth power transmission at extreme limits\u003c\/strong\u003e\n\u003c\/h2\u003e\n\n\u003cp data-start=\"3281\" data-end=\"3502\"\u003e One of the most underrated advantages of Wavetrac is its \u003cstrong data-start=\"3332\" data-end=\"3385\"\u003eextremely smooth power delivery at the limits of traction\u003c\/strong\u003e . The patented design allows for predictable and smooth power delivery exactly when you need it most: \u003c\/p\u003e\n\n\u003cul data-start=\"3504\" data-end=\"3663\"\u003e\n\n\u003cli data-start=\"3504\" data-end=\"3539\"\u003e\n\n\u003cp data-start=\"3506\" data-end=\"3539\"\u003e in the middle of a curve at the limit of grip \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"3540\" data-end=\"3577\"\u003e\n\n\u003cp data-start=\"3542\" data-end=\"3577\"\u003e when balancing a car with gas \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"3578\" data-end=\"3663\"\u003e\n\n\u003cp data-start=\"3580\" data-end=\"3663\"\u003e when entering a corner a little too hard and quickly re-applying the gas\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n \u003cp data-start=\"3665\" data-end=\"3819\"\u003eThese situations are immediately felt by the driver. \u003cstrong data-start=\"3717\" data-end=\"3794\"\u003eWavetrac makes you faster because it gives you the confidence to drive harder.\u003c\/strong\u003e\u003cbr data-start=\"3794\" data-end=\"3797\"\u003e Smoothness is speed.\u003c\/p\u003e\n\n\u003ch2 data-start=\"3826\" data-end=\"3875\"\u003e \u003cstrong data-start=\"3829\" data-end=\"3875\"\u003eIMPORTANT NOTE: Welded Key Ring (BMW)\u003c\/strong\u003e\n\u003c\/h2\u003e\n\n\u003cp data-start=\"3877\" data-end=\"4003\"\u003e Since March 2007, BMW has used rear axle assemblies in which \u003cstrong data-start=\"3944\" data-end=\"4002\"\u003ethe key ring is welded directly to the differential housing\u003c\/strong\u003e .\u003c\/p\u003e\n\n\u003cp data-start=\"4005\" data-end=\"4041\"\u003e Before ordering, please send: \u003c\/p\u003e\n\n\u003cul data-start=\"4042\" data-end=\"4133\"\u003e\n\n\u003cli data-start=\"4042\" data-end=\"4091\"\u003e\n\n\u003cp data-start=\"4044\" data-end=\"4091\"\u003e \u003cstrong data-start=\"4054\" data-end=\"4089\"\u003ethe last 7 characters of the vehicle's VIN number\u003c\/strong\u003e \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"4092\" data-end=\"4112\"\u003e\n\n\u003cp data-start=\"4094\" data-end=\"4112\"\u003e vehicle information \u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"4113\" data-end=\"4133\"\u003e\n\n\u003cp data-start=\"4115\" data-end=\"4133\"\u003e gearbox type\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\u003cp data-start=\"4135\" data-end=\"4241\"\u003e to \u003cstrong data-start=\"4148\" data-end=\"4176\"\u003e\u003ca data-start=\"4150\" data-end=\"4174\" class=\"decorated-link cursor-pointer\" rel=\"noopener\"\u003eparts@qtperformance.fi\u003c\/a\u003e\u003c\/strong\u003e so we can ensure the correct differential and installation kit.\u003c\/p\u003e","brand":"QT Parts","offers":[{"title":"Default Title","offer_id":52401646436699,"sku":"30.309.155WK-1","price":1730.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0713\/9937\/5126\/files\/WTC_BMW_30.309.155WK.png?v=1766944319","url":"https:\/\/www.qtparts.fi\/en-gb\/products\/wavetrac-atb-lsd-lukkopera-bmw-e9x-335i-215k-weld-r-3-08","provider":"QT Parts","version":"1.0","type":"link"}