{"product_id":"wavetrac-30-309-155wkfm1-bmw-f20-f22-atb-lsd-limited-slip-differential-3-08-1-m135i-m140i-m235i-m240i","title":"Wavetrac 30.309.155WKFM1 BMW F20 F22 ATB LSD Limited Slip Differential 3.08:1 (M135i, M140i, M235i \u0026 M240i)","description":"\u003ch4\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eMost BMW axles from 07 onwards were manufactured with a friction welded ring gear and open differential. This can cause some headaches for installation concerning vehicle downtime while the factory differential\/ring gear is separated by precisely machining the parts away.\u003c\/p\u003e\n\u003cp\u003eWavetrac Europe has now solved this for the M140i equipped with the 33107599411 3.08 axle. Have a 2.81 Final Drive Axle? We also stock an axle for this too!\u003cbr\u003e\u003cbr\u003ePlease provide your VIN and transmission type at the checkout during ordering or prior to member of staff by email or phone so we can verify which axle and ratio are correct for you so we supply the correct axle.\u003c\/p\u003e\n\u003cp\u003eThe Wavetrac® differential uses a patent pending design to improve grip in low traction conditions. Unlike any other helical gear diff on the market, the Wavetrac®'s behavior can also be fine-tuned in the field with optional components.\u003cbr\u003eThe Wavetrac® Differential will give you quicker acceleration and faster cornering by driving both drive wheels instead of just one. And, it offers improved no-load performance when compared to other helical gear differentials on the market.\u003c\/p\u003e\n\u003cp\u003eSimply put - Wavetrac is the only gear diff on the market that does not lose all drive when one axle is unloaded. Axles become unloaded in aggressive driving, track cornering, extremely slick surfaces, etc. It happens more than most people realise.\u003c\/p\u003e\n\u003cp\u003eWe won't go into torque bias ratios or the concept of how torque biasing diffs work at this point. Let's get to how the Wavetrac affects performance:\u003c\/p\u003e\n\u003cp\u003eFor example, you have a conventional gear diff (OEM, Quaife, MF, OBX, Truetrac, Torsen, etc.), you're on a race track for a track day and during cornering your inside wheel bumps over the curbing. This is normal for track driving. The issue is that for the brief moments your inside tire becomes unloaded when bouncing over curbs, your other wheel is not getting drive - is not putting power down. Gear diffs need load on both axles in order to function. The result on a track (or during aggressive driving) is that there are many times when a normal gear diff supplies only intermittent power to the gripping wheel.\u003c\/p\u003e\n\u003cp\u003eNow, same track with Wavetrac: the patented cam device in the Wavetrac prevents loss of drive when that inside wheel is unloaded. The device is able to generate a load inside the diff (to replace the lost load as it happens) that can then be biased to the gripping wheel - in the end making more consistent power delivery through a corner. That makes the car more predictable, and faster overall.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eWavetrac ATB LSD\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eARP Ring Gear Bolts\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eNew, Genuine BMW Axle Seals\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBacklash Setup to OE Tolerances\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePrecisely Machined Ring Gear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePLEASE NOTE\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYou will need to spec oil, for this application we advise for Motul Competition 75w140.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\u003cstrong\u003eHere is an overview of the Advantages of Wavetrac over all other ATB LSDs i.e. Quaife\u003c\/strong\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eIf you lift a wheel, all gear diffs except Wavetrac®, will NOT power the other wheel.\u003c\/li\u003e\n\u003cli\u003eDuring the transition from accel to decel, all gear diffs except Wavetrac®, do nothing.\u003c\/li\u003e\n\u003cli\u003eThe patented Wave hub improves driveability and performance during performance driving.\u003c\/li\u003e\n\u003cli\u003eThe pinions in the Wavetrac run on patented Carbon Fibre bias plates in the housing. Whereas all other designs run the pinons directly on the steel housing. Overtime, with the metal on metal contact with other ATB designs friction can reduce and with this performance reduces. The carbon fibre bias plates in the Wavetrac create a consistent friction surface for the life of the differential for consistent performance.\u003c\/li\u003e\n\u003cli\u003eIts gear tooth forms are optimised for strength and improved oil film retention over competitive designs.\u003c\/li\u003e\n\u003cli\u003egear package is smaller, reducing overall mass, yet is more durable since particular attention was paid to the tooth strength - optimised for high torque conditions.\u003c\/li\u003e\n\u003cli\u003eThe internal gears are made from high strength 9310 alloy steel.\u003c\/li\u003e\n\u003cli\u003eThe diff bodies are machined from case-hardened steel billet.\u003c\/li\u003e\n\u003cli\u003eEvery Wavetrac® differential is built exclusively using high quality, high strength fasteners from ARP®, the world leader in fastener technology\u003c\/li\u003e\n\u003cli\u003eDirect comparison between Wavetrac \u0026amp; Quaife:\u003cspan\u003e \u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/E4wY2NoJ6f8\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\"\u003e\u003c\/iframe\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eWavetrac maintains function throughout the corner\u003c\/li\u003e\n\u003cli\u003eQuaife performs like an open diff throughout the corner, sending power to the inside wheel and slowing momentum (you can see on the dash in that youtube video wheel speed increases but the vehicle speed does not)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli\u003eWavetrac has a Lifetime, transferable warranty in all use cases including road, track, professional Motorsport, drag strip, rally etc\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHere is an overview of the Advantages of a Wavetrac over plate LSDs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWavetrac requires zero maintenance. Plate LSDs require frequent servicing to maintain performance. As they are used the friction plates wear and performance drops off.\u003c\/li\u003e\n\u003cli\u003eWavetrac does not increase Noise Vibration or Harshness. Noise Vibration \u0026amp; Harshness is comparatively higher and much more noticeable on a plate LSD.\u003c\/li\u003e\n\u003cli\u003eWavetrac allows for chassis stiffness to be setup comparatively softer vs. a plate style LSD as you are not overcoming an locked axle on turn-in. This improves overall mechanical grip, allowing for more setup variation.\u003c\/li\u003e\n\u003cli\u003eWavetrac never locks harshly, improving longevity of driveline components i.e. driveshafts.\u003c\/li\u003e\n\u003cli\u003eWavetrac has a Lifetime, transferable warranty in all use cases including road, track, professional Motorsport, drag strip, rally etc whereas plate differentials typically come with no warranty or a very limited warranty \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003col\u003e\u003c\/ol\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eFully Built LSD option\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWavetrac ATB LSD\u003c\/li\u003e\n\u003cli\u003eOE BMW ring gear bolts\u003c\/li\u003e\n\u003cli\u003eNew, Genuine BMW Axle Seals\u003c\/li\u003e\n\u003cli\u003eBacklash Setup to OE Tolerances\u003c\/li\u003e\n\u003cli\u003ePrecisely Machined Ring Gear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1' F20, M135i, 5 doors, N55, EUR, (1B71) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F20, M135i, 5 doors, N55, EUR, (1B72) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F20 LCI, M135i, 5 doors, N55, EUR, (1V11) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F20 LCI, M135i, 5 doors, N55, EUR, (1V12) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F20 LCI, M140i, 5 doors, B58, EUR, (1S91) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F20 LCI, M140i, 5 doors, B58, EUR, (1S92) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F21, M135i, 3 doors, N55, EUR, (1N71) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F21, M135i, 3 doors, N55, EUR, (1N72) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F21 LCI, M135i, 3 doors, N55, EUR, (1Y71) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F21 LCI, M135i, 3 doors, N55, EUR, (1Y72) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F21 LCI, M140i, 3 doors, B58, EUR, (1W91) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e1' F21 LCI, M140i, 3 doors, B58, EUR, (1W92) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F22, M235i, Coupe, N55, EUR, (1J71) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F22, M235i, Coupe, N55, EUR, (1J72) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F22, M235i, Coupe, N55, USA, (1J73) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F22, M240i, Coupe, B58, EUR, (2G11) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F22, M240i, Coupe, B58, EUR, (2G12) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F22, M240i, Coupe, B58, USA, (2G13) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F23, M235i, Convertible, N55, EUR, (1M11) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F23, M235i, Convertible, N55, EUR, (1M12) : Rear-axle-drive\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e2' F23, M235i, Convertible, N55, USA, (1M13) :\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePlease Note: \u003c\/strong\u003eNot available for xDrive models, if you have an xDrive model and require this option, please contact us and we will do our best to assist.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eCompatibility Check\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003eTo ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout.\u003c\/p\u003e\n\u003cp\u003e  \u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e30.309.155WKFM1\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cstrong\u003eMore Information\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eManufactured by\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWavetrac\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWavetrac Differential Limited Lifetime Warranty\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\n\u003cspan\u003e\u003c\/span\u003e\u003cbr\u003e\n\u003c\/h4\u003e","brand":"Wavetrac","offers":[{"title":"Built Differential","offer_id":64544745357661,"sku":"30.309.155WKFM1","price":1803.71,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1069\/0009\/5325\/files\/Wavetrac30.309.155WKFM1BMWF20F22ATBLSDLimitedSlipDifferential3.081_M135i_M140i_M235i_M240i_-1_65c63fca-f4f1-4343-964d-537189000ed3.jpg?v=1777349036","url":"https:\/\/performancepartsdirect.co.uk\/products\/wavetrac-30-309-155wkfm1-bmw-f20-f22-atb-lsd-limited-slip-differential-3-08-1-m135i-m140i-m235i-m240i","provider":"Performance Parts Direct","version":"1.0","type":"link"}