The Wavetrac BMW 335i 135i LSD is a helical limited slip differential for the BMW 215K axle with welded ring gear, final drive ratio 3.08 and higher: E9X 335i and E8X 135i.
Not sure it suits your vehicle? Send us your rego and we will confirm before you order.
All work and parts supplied by Gearhead Diffs are covered for 12 months or 20,000 km, whichever comes first, provided the vehicle is serviced to schedule, filled with the correct spec Red Line oil and not misused.
Shipped NZ wide by courier. Overnight to most South Island addresses, one to two days to the North Island, rural delivery can add a day. Freight is calculated at checkout, or free when it travels in the box with an exchange diff.
The Wavetrac BMW 335i 135i LSD is a helical limited slip differential for the BMW 215K axle with welded ring gear, final drive ratio 3.08 and higher: E9X 335i and E8X 135i.
Wavetrac part number: 30.309.155WK
Fits: BMW 215K axle with welded ring gear, final drive ratio 3.08 and higher: E9X 335i and E8X 135i.
Installation notes: All welded OEM gear assemblies require machine work. Installation kits are sold separately.
Wavetrac designed this differential from a clean sheet, so it brings current gear technology to the market. Internally, the gear tooth forms give more strength and better oil film retention than competitive designs. The gear package is also smaller, which reduces overall mass yet makes it more durable. In addition, Wavetrac put as much material as possible at the side gear and axle interface, because this area matters most when power levels get high.
The Wavetrac BMW 335i 135i unit uses patented technology that mitigates wheelspin when an unloaded wheel condition arises. In fact, it is the only torque-biasing differential on the market that does this. During zero axle load conditions, the Wavetrac cam device acts to create internal load. As a result, it maintains drive on the gripping wheel instead of acting like an open diff and going nowhere.
Wavetrac crafts each differential from the highest quality materials available. The internal gears use high-strength 9310 alloy steel, and the diff bodies come from case-hardened steel billet. To complete the package, every Wavetrac differential uses high-strength fasteners from ARP, the world leader in fasteners. Finally, all Wavetrac differentials include a transferable limited lifetime warranty.
The Wavetrac BMW 335i 135i LSD is a special order item, so please enquire for pricing and lead time. We can check the fitment against your VIN or rego number, and we can also fit the unit for you in our Christchurch workshop. Lead times vary by unit, so we quote each order fresh and confirm the delivery date with you before we order. Please note that special order parts may not be returnable.
Had the classic whine at 80. Diff turned up next morning, swapped it over myself with the fitting guide, return label was in the box. Three weeks on and dead quiet. Core charge came back inside a week.
Rural delivery so it was two days not one. The part itself is mint and the oil was in the box which I did not expect.
Price was the price, no surprises. Return pickup was already booked which made life easy.
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