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BMW Differential and Gearing Upgrades for BMW F93 M8 S63 4.4L

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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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Turner Titanium Magnetic Differential Drain Plug - M22x1.5

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T#:593924

Part#: 027030TMS01

In Stock

Sale - Save 25% $ 87.99

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

$ 65.99 USD

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Sale - Save 25%

$ 87.99

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

$ 65.99 USD

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When both extreme-duty protection and saving every gram matters: the Turner Magnetic Differential Drain Plug.

OEM Rein Magnetic Differential Oil Drain Plug - M22x1.5 - Most BMW &a...

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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:38890943

Part#: HWU0065

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$ 23.99 USD

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$ 23.99 USD

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As components in the differential begin to wear, metal particles become loose in the diff fluid, which can lead to excess wear. This magnetic plug pulls these particles out of suspension, helping to reduce wear over time. Replaces BMW # 33117525064

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ECS Magnetic Differential Oil Drain Plug - Most BMW & Mini Models...

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T#:366828

Part#: 009314ECS01A

In Stock

Sale - Save 35% $ 60.99

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

$ 39.64 USD

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Sale - Save 35%

$ 60.99

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

$ 39.64 USD

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You use a magnetic drain plug for your engine oil, right? Why not apply the same proactive thinking to the differential too? This is a direct replacement magnetic differential drain plug for your BMW. It will catch and retain fine and larger metal particles in your diff oil. If you're proactive in your diff oil servicing, you will catch a minor issue long before it becomes a headache. Diff drain plug includes one sealing o-ring. Direct replacement for Genuine BMW part number(s): 33117525064, 33110308370, 33110152626

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Loctite 5970 Gasket/Sealing Compound - 50ml

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T#:25772539

Part#: 5970

In Stock at Vendor

$ 66.64

This product was last offered at the strikethrough price on
12-26-2025

$ 52.25 USD

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$ 52.25 USD

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This Loctite 5970 Sealant is recommended by BMW to be used to seal the rear differential cover and numerous engine oil pans. Also used for multiple MINI, Audi, and VW applications.

BMW Differential Seal - Rear Axle

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T#:28570751

Part#: 33108860348

In Stock

5% off MSRP $ 96.99

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

$ 91.99 USD

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5% off MSRP

$ 96.99

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

$ 91.99 USD

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The BMW Axle Shaft Seal is an essential component designed to prevent fluid leaks around the axle shaft, ensuring the proper functioning of the vehicle's drivetrain system. This seal helps protect the differential or transmission, keeping contaminants like dirt and water out while retaining the necessary lubricants. Key Features: Prevents Leaks: Effectively stops oil or fluid leaks, preserving drivetrain performance. Durable Construction: Made from high-quality rubber or synthetic materials for long-lasting resistance to wear. OEM Quality: A genuine BMW part, ensuring a perfect fit and reliable functionality. Performance Protection: Shields drivetrain components from contaminants and minimizes the risk of premature damage. Application: Used in BMW vehicles, the axle shaft seal ensures the axle shaft remains sealed during operation, preventing fluid loss and protecting against potential damage to other parts.

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Genuine BMW Differential Temperature Sensor - F8X G8X G2X

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T#:174736

Part#: 33107847469

In Stock

5% off MSRP $ 37.99

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

$ 35.99 USD

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5% off MSRP

$ 37.99

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

$ 35.99 USD

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This is a replacement Genuine BMW rear differential temperature sensor - monitors the temperature fo the rear differential fluid. Note: For Non-M models, this sensor is used in M Sport limited slip differentials only. Not used in base model open differentials.

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OEM Elring Rear Differential Axle Shaft Seal - BMW F3X G2X G8X & ...

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T#:53008820

Part#: 33108860348

In Stock at Vendor

$ 44.99

This product was last offered at the strikethrough price on
05-08-2026

$ 43.99 USD

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$ 43.99 USD

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The Axle Shaft Seal is a critical component designed to prevent fluid leaks around the axle shaft, ensuring the proper function of the vehicle’s drivetrain system. This seal helps maintain the integrity of the differential, preventing dirt, water, or contaminants from entering the diff while keeping lubricants contained.

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Genuine BMW Lock Ring - 27107539525

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T#:53816

Part#: 27107539525

Ships in 1-2 days

6% off MSRP $ 16.99

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

$ 15.99 USD

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6% off MSRP

$ 16.99

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

$ 15.99 USD

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Replace these when reassembling the transfer case. Genuine BMW Lock Ring - 28X2 This item fits the following BMW Chassis: E70 X5M,E71 X6M,E53 48IS,E53 X5,E70 X5,E71 X6,E83 X3,E90,E92,F01,F02,F06,F10,F12,F13,F15,F16,F25 X3,F26 X4 X4,F30,F31,F32,F33,F34,F36

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