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BMW Differential and Gearing Upgrades for BMW 3 Series E90 (2006-2011)

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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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Team MFactory Metal Plate Limited-Slip Differential (LSD) - 1.5 Way -...

For vehicles with an automatic or manual transmission with a Final Gear Ratio of 3.15 ... For Vehicles with automatic transmission (ring gear machining or new ring&pinion requir...

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

T#:379408

Part#: MF-TRS-10E90A

Ships on Aug 3, 2026

$ 999.99 USD

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$ 999.99 USD

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The best way to gain a prominent advantage over the competition is to do it with the MFactory Metal Plate Limited Slip Differential. The smooth consistent distribution of power to the wheels with the MFactory Plate LSD puts the power to the ground and maximizes your vehicle's traction. This 1.5-way differential works similarly to a 2-way in that it provides torque transfer during both acceleration and deceleration. However, the advantage over a 2-way is that it requires less force to lock the differential. This means that it will allow for different wheel speeds, like when cornering. A 1.5-way differential is typically the best option for track or street use, as it keeps from having one tire skipping or dragging.

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Differential Shim Kit E46 325Ci / 325i / 328Ci / 328i / 330Ci / 330i ...

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

T#:1762239

Part#: MF-TRS-SKE46

Ships in 3 Business Days

$ 199.99 USD

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$ 199.99 USD

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Streamline the setup process for your Limited Slip Differential (LSD) with this mandatory back-lash setting tool. This custom-designed tool is instrumental in reducing installation time by a whopping 50%! It's important to note that this tool is not part of BMW's offerings. Should there be any defects or warranty-related matters, it's advisable to directly reach out to Team M Factory for prompt resolution.

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Differential Input Shaft Seal - Priced Each

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

T#:44021076

Part#: 33121213949

In Stock at Vendor

$ 27.99

This product was last offered at the strikethrough price on
05-07-2026

$ 26.99 USD

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$ 26.99 USD

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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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RevShift Differential Bushing Set - BMW E9X / E8X - 80A Street ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For Non-M Models Only

T#:39363088

Part#: DBS-E9X80A-REV

Ships in 3 Business Days

$ 129.99 USD

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$ 129.99 USD

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Differential Bushing Set - BMW E9X / E8X (Non-M) Enhance your driveline performance with this premium differential bushing set, designed specifically for E9X and E8X Non-M models. Factory rubber bushings degrade over time, leading to excessive drivetrain movement, clunking, and inefficient power transfer. These high-quality replacement bushings provide firm, reliable differential support, minimizing deflection for sharper throttle response and improved drivetrain stability. Whether you're replacing worn-out components or upgrading for spirited driving, this set delivers a more connected and controlled feel on the road. Precision-engineered for a direct OE-style fit, these bushings install seamlessly without modifications. Restore crisp, precise performance to your BMW today! ✅ Direct-fit replacement for aging factory bushings ✅ Reduces drivetrain flex and enhances power delivery ✅ Perfect for daily drivers and performance applications 📦 Includes: Full set of differential bushings for a complete refresh.

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Team MFactory 3.46 Pumpkin With Helical LSD - E82/88 135i, E9X 335i/i...

For vehicles with automatic transmission with production from 08/2007

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

T#:382799

Part#: MF-TRS-05E9234KT

Ships in 8 Business Days

$ 2,276.99 USD

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$ 2,276.99 USD

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Premium Differential Service Kit - E46 M3, E9X M3, E82 1 M Coupe ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Includes BMW SAF-XJ limited slip differential fluid with FM booster

T#:598688

Part#: E46M3DIFSERTMSKT

In Stock

Sale - Save 8% $ 301.99

This product was last offered at the strikethrough price on
05-03-2026

$ 277.83 USD

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Qty

Sale - Save 8%

$ 301.99

This product was last offered at the strikethrough price on
05-03-2026

$ 277.83 USD

Add to Wish List

Servicing your differential is an important job and should only be completed using high quality components! To ensure our customers are getting exactly what they need, we have put together this limited-slip differential service kit that includes all new fluid from BMW, a new BMW drain plug, and one of our new Titanium Magnetic Differential Drain Plugs!

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Differential Rebuild Kit Plus 215mm Differential Case

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

T#:381010

Part#: MF-TRS-DBE92S

Ships in 6 Business Days

$ 296.99 USD

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$ 296.99 USD

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Differential Rebuild Kit Plus by Team MFactory

Upgrade your BMW's differential with the Differential Rebuild Kit Plus by Team MFactory. Whether you've recently replaced your differential or upgraded to a Limited-Slip, it's essential to replace the hardware to ensure optimal performance. This comprehensive kit from ECS Tuning includes 10 Differential Ring Gear Bolts, new axle seals, and new differential bearings, providing everything you need for a complete differential rebuild. With high-quality components, you can trust this kit to support your new differential or rebuild your existing unit effectively.

Comprehensive kit includes Differential Ring Gear Bolts, axle seals, and differential bearings
Ensures optimal performance of your BMW's differential
Perfect for differential replacement or upgrades to Limited-Slip
High-quality components for reliability and durability
Provides all necessary hardware for a complete rebuild

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Genuine BMW Axle Shaft Seal With Lock Ring 33107505605

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

T#:20829

Part#: 33107505605

Ships in 1 day

8% off MSRP $ 23.99

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

$ 21.99 USD

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8% off MSRP

$ 23.99

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

$ 21.99 USD

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Used to create a seal on your differential where the axle shaft connects

Genuine BMW Shaft Seal With Lock Ring - 100X50X10
This item fits the following BMW Chassis:
E53 48IS,E38,E39,E53 X5,E63,E65,E82,E89 Z4,E90,E92,E93

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BMS Differential Support Bracket Brace - BMW 135i / E9x 335i - Large ...

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

T#:1316771

Part#: E9XDIFFBRACE-LG

Ships in 1 Business Day

$ 99.00 USD

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$ 99.00 USD

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

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

T#:60061

Part#: 33312283384

Ships in 1 day

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 Output Shaft Seal Dust Cover - Large

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

T#:59505

Part#: 33131428097

Ships in 1 day

5% off MSRP $ 56.99

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

$ 54.00 USD

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5% off MSRP

$ 56.99

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

$ 54.00 USD

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Genuine BMW Dust Guard Ring, Outer - D=68,8
This item fits the following BMW Chassis:
E39,E46,E53 X5,E65,E70 X5,E82,E83 X3,E85,E86,E89 Z4,E90,E92,E93,F01,F02,F06,F10,F12,F13,F15,F16,F25 X3,F26 X4

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