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Differential and Gearing Upgrades

Genuine BMW BMW Differential and Gearing Upgrades for BMW 3 Series E93 (2007-2013)

Upgrading various parts of the differential can have tremendous benefits in your car's performance. It's easy to forget that the differential is a source for making your car faster and handle better so it's often overlooked. The engine is not the only place to make the car faster. Our differential options vary from gearing upgrades to limited slip conversions. You can purchase the ring & pinion gear sets on their own (professional installation required) or have us build a diff around your own specifcations. The options are almost endless! Every custom-built diff is fully rebuilt with seals and bearings. We also design and supply bushing options to reduce driveline wind-up, finned differential covers for better cooling, and more!

Ratio Changes - Changing the differential gearing is one of the best and most-effective upgrades you can make on any BMW (old or new). By using a shorter (numerically higher) final drive ratio you are increasing your RPM relative to road speed - this puts you in a more powerful RPM range than before! Since you're in a 'meatier' part of the power band you're now putting down more power/torque to the ground. If you can trade outright top speed for faster acceleration at daily speeds then this is the perfect upgrade for you.

Limited Slip Upgrades - Sadly, many BMWs today are not equipped with a limited slip (posi-traction) differential. BMW has tried to compensate by using traction control that cuts power at the engine or applies the brakes to retard wheel spin (or a combination of both). But nothing beats the function and feel of a a true LSD which may be why BMW continues to use them in M cars. Our LSD upgrades can be done a number of different ways - a factory-type limited slip unit with either 2 or 3 clutch packs, helical type, OS Giken unit, or something truly custom. We can also vary ramp angles and setup to change the limited-slip behavior under acceleration, deceleration, and cornering. Need a custom diff? Call or e-mail to have a quote.

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Genuine BMW Differential Service Kit - E46 M3, E90 E92 E93 M3, Z4 M, ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:370652

Part#: E46M3DIFSER

In Stock

$ 226.99

This product was last offered at the strikethrough price on
06-03-2026

$ 212.99 USD

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$ 212.99 USD

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Genuine BMW Differential Carrier Bushing - Rear Position - E90 E92 E9...

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T#:60061

Part#: 33312283384

Ships in 2 Business Days

2% off MSRP $ 103.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 101.99 USD

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2% off MSRP

$ 103.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 101.99 USD

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This is the rear differential carrier bushing located in the rear subframe.

Genuine BMW Differential Service Kit - E90/2/3 328i 330i/xi, E53 E70...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:376883

Part#: 33117695240KT1

Ships in 2 Business Days

$ 304.99

This product was last offered at the strikethrough price on
03-04-2026

$ 278.99 USD

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$ 278.99 USD

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Often overlooked, scheduled rear differential service is very important. Over time gear lube breaks down causing bearings and internal components fail. Regular maintenance will keep your vehicle running properly for years to come.

Please see kit contents tab for included items.

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