{"product_id":"wavetrac-bmw-e38-e39-e46-e60-e90-f21-limited-slip-differential-inc-125d-330d-325d-330d-430d-525d-530d-740d","title":"Wavetrac ATB Gear-Type Limited Slip Differential (LSD) for BMW Diesel E38 E39 E46 E60 E90 F21 F32 - 125d 325d 330d 430d 525d 530d 535d 740d - Fits 215K Bolted Ring Gear - Part No 30.309.140WK","description":"\u003cdiv class=\"product__description rte\"\u003e\n  \u003cdiv\u003e\n    \n    \u003ch2\u003eBMW Diesel Rear Diff Upgrade with Wavetrac Helical Torque-Biasing Centre – Part No 30.309.140WK\u003c\/h2\u003e\n    \n    \u003cp\u003eUnlock serious traction, sharper turn-in and confident power delivery in your BMW diesel with this Wavetrac helical gear differential centre. It transforms how your car accelerates out of bends and puts torque to the ground on bumpy, wet or uneven roads. Ideal for fast road, spirited B-road driving and track days, while remaining quiet and civilised for daily use.\u003c\/p\u003e\n    \n    \u003cp\u003eUnlike conventional helical units that can fade when an inside wheel goes light, Wavetrac’s patented internal cam mechanism generates load so drive is maintained to the tyre with grip. The result is crisp response, predictable handling and consistent performance whether you are exiting a tight hairpin or dealing with slippery surfaces.\u003c\/p\u003e\n    \n    \u003ch3\u003eWhy enthusiasts choose this Wavetrac unit\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003eKeeps driving when one axle is unloaded. Maintains forward motion over kerbs, cambers, potholes and slick patches.\u003c\/li\u003e\n      \u003cli\u003eSmooth, progressive torque transfer that inspires confidence on the road and during open pitlane sessions.\u003c\/li\u003e\n      \u003cli\u003eNo clutch packs to service. Helical design means no special oils, no chatter and outstanding durability.\u003c\/li\u003e\n      \u003cli\u003eExcellent road manners with factory electronics. No drama, just grip.\u003c\/li\u003e\n      \u003cli\u003eProven on our customers’ cars. We have installed these units and feedback has been superb for wet-weather traction and corner exit speed.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003ch3\u003eConstruction and key tech\u003c\/h3\u003e\n    \u003cul\u003e\n      \u003cli\u003ePatented Wave Profile cam device that addresses near zero-load situations seen with typical torque-biasing designs.\u003c\/li\u003e\n      \u003cli\u003eCarbon fibre bias plates for consistent behaviour from new and over long-term use.\u003c\/li\u003e\n      \u003cli\u003e9310 alloy steel gears housed in robust billet or forged bodies for high-torque diesel applications.\u003c\/li\u003e\n      \u003cli\u003eARP hardware throughout for strength and reliability.\u003c\/li\u003e\n      \u003cli\u003eMade in the USA to exacting standards.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003ch3\u003eFitment details\u003c\/h3\u003e\n    \u003cp\u003eFor BMW models using the 215K casing with a bolted crown wheel. Axle ratio range r = 2.35 to 2.81. This is a direct replacement differential centre for cars with a bolted ring gear.\u003c\/p\u003e\n    \n    \u003ch4\u003eSupported applications include\u003c\/h4\u003e\n    \u003cul\u003e\n      \u003cli\u003eE60 525d up to 03\/2007, 530d, 535d\u003c\/li\u003e\n      \u003cli\u003eE46 330d manual\u003c\/li\u003e\n      \u003cli\u003eE39 530d manual\u003c\/li\u003e\n      \u003cli\u003eE38 740d\u003c\/li\u003e\n      \u003cli\u003eE90 325d manual up to 03\/2007, 330d manual up to 01\/2007\u003c\/li\u003e\n      \u003cli\u003eF21 125d automatic\u003c\/li\u003e\n      \u003cli\u003eF32 430d with 2.56 final drive\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n    \u003cp\u003eIf you are unsure about casing type, ratio or whether your crown wheel is bolted, we can confirm before you buy.\u003c\/p\u003e\n    \n    \u003ch3\u003eHow it feels on the road\u003c\/h3\u003e\n    \u003cp\u003eTurn in, get back on the throttle earlier and drive out of corners with authority. On greasy mornings and soaked motorways it delivers stable, predictable traction. On track it gives you repeatable performance lap after lap without harshness.\u003c\/p\u003e\n    \n    \u003ch3\u003ePart number\u003c\/h3\u003e\n    \u003cp\u003e\u003cstrong\u003e30.309.140WK\u003c\/strong\u003e\u003c\/p\u003e\n    \n    \u003ch3\u003eFitting and setup\u003c\/h3\u003e\n    \u003cp\u003eProfessional installation recommended. MJ Modifications offers supply and fitting in Warwickshire. Email \u003ca href=\"mailto:info@mjmodifications.co.uk\"\u003einfo@mjmodifications.co.uk\u003c\/a\u003e for a tailored quote and advice on bearings, seals and the correct gear oil for your build.\u003c\/p\u003e\n    \n    \u003ch3\u003eCompatibility check\u003c\/h3\u003e\n    \u003cp\u003eAdd your UK registration or the last 7 of your VIN at checkout and we will verify the correct differential centre before dispatch.\u003c\/p\u003e\n    \n    \u003ch3\u003eManufacturer and warranty\u003c\/h3\u003e\n    \u003cp\u003eManufacturer: Wavetrac\u003c\/p\u003e\n    \u003cp\u003eWarranty: Wavetrac Differential Limited Lifetime Warranty\u003c\/p\u003e\n    \n    \u003chr\u003e\n    \n    \u003ch3\u003eAlso searched as\u003c\/h3\u003e\n    \u003cp\u003eBMW rear differential upgrade, BMW diesel diff centre, helical LSD conversion, torque sensing differential for 330d, performance diff for 325d 530d 535d 740d 125d 430d, E46 330d diff centre, E90 330d differential upgrade, E60 530d final drive, E39 530d limited slip, F21 125d rear diff, F32 430d LSD, 215K case differential, bolted crownwheel diff, BMW diesel traction upgrade, BMW helical gear LSD, BMW ATB diff, BMW rear axle upgrade.\u003c\/p\u003e\n    \n    \u003cp\u003eUpgrade your BMW with a Wavetrac helical differential centre and enjoy more grip, better stability and faster exits. Order today or contact MJ Modifications in Warwickshire for expert installation.\u003c\/p\u003e\n    \n  \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wavetrac","offers":[{"title":"Default Title","offer_id":56005680726402,"sku":null,"price":1348.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0871\/5445\/8937\/files\/10.309.175WK10.309.175WK-2_2_1100x_2467a212-b476-4f88-9bcc-103e4c8e7aae.webp?v=1764021472","url":"https:\/\/mjmodifications.co.uk\/products\/wavetrac-bmw-e38-e39-e46-e60-e90-f21-limited-slip-differential-inc-125d-330d-325d-330d-430d-525d-530d-740d","provider":"MJ Modifications","version":"1.0","type":"link"}