Its torque-biasing design is better at putting traction down too - constantly detecting wheel slip and manipulating the torque accordingly, and applying it in a progressive, user-friendly manner. By using a clever scroll gear system that biases torque to the wheel with more grip, it has no wearing components and comes with a limited lifetime warranty. When the time comes to replace your BMW M Differential, the QUAIFE ATB Differential is a superior solution. What's worse is a new BMW M Differential for the E46 M3 will cost you more than £3120 + fitting. They are given an average lifespan of around 60,000 miles, but we have seen them fail as low as 30,000 miles when used aggressively. The BMW M Differential uses a basic clutch type LSD which wears out over time, deteriorating in performance before eventually needing to be replaced.
Please contact us for prices and information.** How is the Quaife ATB Differential superior? **QUAIFE LSD upgrade only (without bearings) is also available for £2080 incl UK VAT (fitted). UK VAT) Warranty: 24 month guarantee, & lifetime guarantee on the LSD itself. This includes all new BMW bearings, seals and full housing restoration.
Lastly, there are some upgrade options that may be selected including ring and pinion polishing for reduced friction / lower temperatures, upgraded rear covers, as well as miscellaneous bolts and fluids.The BMW E46 M3 Exchange QUAIFE LSD Differential by Birds is a complete differential equipped with a Quaife LSD in exchange for your existing differential. Take a look at our RPM / MPH chart in Technical Information to see how various ratio's may affect your cars performance. The higher the gear ratio, the more RPM's an engine must turn to keep your speed constant.
The gear ratio determines the number of revolutions of the wheel for every revolution of the drive shaft. The first decision to make when buying a custom differential is to determine the gearing you want. We start by cleaning the differential housing, then select the industry's finest ring and pinion gears, apply the desired clutch packs and options, and finally carefully assemble the housing to be shipped to your door.
To get the most performance on the track, we would recommend changing the gear ratio to 4.10 for the 6 speed cars and 3.85 for SMG option.ĭiffsonline builds a wide variety of BMW differentials in house to accommodate the several different differential housings used in modern BMW's. We have found that using a 3 clutch limited slip with either the 35/60 or 30/90 ramp angles for a much longer life span and better all around performance. We can refresh the M variable limited slip for a stock rebuild. The E46 M3 came with the M Variable limited slip that is known for a relatively short life span (right around 80k miles).
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