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BMW Differential and Gearing Upgrades for BMW 3 Series F34 (2014+)

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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

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$ 65.99 USD

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

Rear Differential Mounts - Turner Solid Delrin Race - E82, E9X, F22, ...

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T#:1997

Part#: TDR9080BD2

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$ 317.04 USD

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Made in the USA

TMS E90/E92/E82 (NON M) solid differential mounts are designed around current Grand Am Cup regulations, derived from, and currently used in TMS racecars. Thick Delrin casings are used as the non-metallic solid bushing. Replacing your differentials rubber mounts with this kit will result in a snappier feel when cornering and better suspension performance. You save money by never having to replace the stock rubber mounts that fail due to old age and fatigue. These bushings are CNC machined in the USA and made with high-grade materials.

These solid differential bushings/mounts fit the following BMWs:
2008-2012 E82 BMW 128i 135i
2014+ F22 BMW 228i 228iX M235i M235iX
2006-2011 E90 BMW 325i 325xi 328i 328xi 328i xDrive 330i 330xi 335d 335i 335xi 335i xDrive - Sedan
2006-2012 E91 BMW 325xi 328i 328xi 328i xDrive - Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive 335i 335is 335xi 335i xDrive - Coupe
2007-2013 E93 BMW 328i 335i - Convertible
2012+ F30 BMW 320i 320iX 328i 328iX 335i 335iX - Sedan
2012+ F31 BMW 328i 328iX - Wagon
2014+ F34 BMW 328i 328iX 335iX - Gran Turismo
2014+ F32 BMW 428i 428iX 435i 435iX - Coupe
2014+ F33 BMW 428i 428iX 435i 435iX - Convertible

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

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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

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$ 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.

Differential - mount bushing

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T#:26938502

Part#: KDT919

Ships in 4 Business Days

$ 96.99 USD

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After thorough development and material testing aimed at achieving strength, durability, geometry retention, and memory without compromising comfort, WHITELINE has introduced a progressive, long-chain Synthetic Elastomer. This groundbreaking material combines the advantages of solid bushings with the flexibility characteristics of rubber, striking an optimal balance between performance and comfort.

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BMW Differential Seal - Rear Axle

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T#:31655802

Part#: 33108860346

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2% off MSRP $ 96.58

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$ 94.99 USD

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2% off MSRP

$ 96.58

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$ 94.99 USD

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Proper fluid levels in the rear differential are crucial for its performance and longevity. Ignoring a leaking shaft seal can lead to severe damage. Each vehicle requires two seals.

Burger Motorsports Differential Support Bracket Brace - F-Chassis BMW...

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T#:637547

Part#: BMS-DSBB-F

Ships in 2 Business Days

Starting at $ 129.00 USD

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Starting at $ 129.00 USD

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The BMS differential brace attaches the rear differential to the subframe allowing better launches, less wheel hop, and a more stable feeling rear chassis. Their unique one-piece construction eliminates welding weak points common on similar units. No logos or markings are visible for a stealth OEM appearance.

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Conder Speed Shop Solid Transmission Mounts - BMW F22/23 F3X RWD ...

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T#:597365

Part#: TRANSIX_F2XF3X

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$ 34.00 USD

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$ 34.00 USD

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These UHMW race grade transmission mounts are the ultimate solution to keep your transmission from moving under heavy load or acceleration. Transmission movement or "play" can cause missed shifts and extreme mechanical damage in some cases.

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Performance Polyurethane Differential Bushing Set - 95A - F3x ...

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T#:656153

Part#: 026696ECS10

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$ 184.79 USD

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Differential bushings are responsible for keeping your rear end planted during the delivery of power to the rear wheels. As these bushings age, they wear out and should be replaced. If you ever see your bushings are cracked, it is time to replace them. By eliminating the drivetrain deflection that factory rubber bushings permit, throttle response is improved, and the tendency for a car to “Wheel Hop” is significantly reduced. Upgrade to ECS Poly Diff Bushings and feel the difference!

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URO Differential Output Shaft Seal W/ Lock Ring - BMW E36 E46 E53 E60...

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T#:43750219

Part#: 33107505604

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$ 10.00 USD

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Maintaining a proper amount of fluid in the rear differential is vital to the performance and longevity of the differential. If a leaking shaft seal is left untouched, the results could be catastrophic. Two seals required per vehicle.

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Corteco Output Shaft Seal

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T#:583459

Part#: 33107505604

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$ 13.98

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02-03-2026

$ 11.99 USD

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Seals the axles into the differential

Genuine BMW Engine & Trans Suspension Hex Nut With Plate 22316760...

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T#:7561

Part#: 22316760944

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$ 2.99 USD

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Genuine BMW Hex Nut With Plate - M8
This item fits the following BMW Chassis:
E30 M3,E36 M3,E34 M5,E39 M5,E60 M5,E63 M6,E46 M3,E82 1M Coupe,E85 Z4M,E30,E34,E36,E38,E39,E46,E63,E65,E82,E85 Z4,E86 Z4,E89 Z4,E90,E92,E93,F22,F30,F31,F32,F33,F34,F36,F80 M3,F82 M4,F83

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Differential Drain Plug with O-Ring - Most BMWs

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T#:7923

Part#: 33117525064

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15% off MSRP $ 11.61

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$ 9.87 USD

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$ 11.61

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$ 9.87 USD

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This is the front or rear Genuine BMW differential fluid drain plug for many BMWs. This can also be the transfer case plug or automatic transmission plug on some BMWs.

+ Year & Model Applications

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This item fits the following BMWs:
1970-1976 2002 BMW 1600 2002 2002tii
2008+ E82 BMW 128i 135i 1M Coupe
1977-1983 E21 BMW 320i 323i
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1992-1998 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi M3
2006-2011 E90 BMW 325i 325xi 328i 328xi 328i xDrive 330i 330xi 335d 335i 335xi 335i xDrive M3 - Sedan
2006-2012 E91 BMW 325xi 328i 328xi 328i xDrive - Wagon
2007-2012 E92 BMW 328i 328xi 328i xDrive 335i 335is 335xi 335i xDrive M3 - Coupe
2007-2012 E93 BMW 328i 335i M3 - Convertible
1976-1981 E12 BMW 528i 530i
1982-1988 E28 BMW 524td 528e 533i 535i 535is M5
1989-1995 E34 BMW 525i 530i 535i 540i M5
1997-2003 E39 BMW 525i 528i 530i 540i M5
2004-2010 E60 BMW 525i 525xi 530i 530xi 528i 528xi 528i xDrive 535i 535xi 535i xDrive 545i 550i M5
2010+ F07 BMW 535i GT, 535i xDrive GT, 550i GT, 550i xDrive GT
2011+ F10 BMW 528i 528i xDrive 535i 535i xDrive 550i 550i xDrive M5
1982-1989 E24 BMW 633csi 635csi M6
2004-2010 E63 BMW 645ci 650i M6
2012+ F12 BMW 640i 650i
1981-1987 E23 BMW 733i 735i
1988-1994 E32 BMW 735i 735il 740i 740il 750il
1995-2001 E38 BMW 740i 740il 750il
2002-2008 E65 BMW 745i 745li 750i 750li 760i 760li
2009+ F01 BMW 740i 740li 750i 750li 750i xDrive 750li xDrive 760li
1990-1999 E31 BMW 840i 840ci 850i 850ci 850csi
2004-2010 E83 BMW X3 2.5i X3 3.0i X3 3.0si
2011+ F25 BMW X3 xDrive28i X3 xDrive35i
2000-2006 E53 BMW X5 3.0i X5 4.4i X5 4.6is X5 4.8is
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive35d X5 xDrive35i X5 xDrive48i X5M
2008+ E71 BMW X6 xDrive35i X6 xDrive50i X6M
1997-2002 Z3 BMW Z3 1.9 Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
2003-2008 E85 BMW Z4 2.5i Z4 3.0i Z4 3.0si Z4 M Roadster M Coupe
2009+ Z4 BMW Z4 sDrive30i Z4 sDrive35i Z4 sDrive35is
2000-2003 E52 BMW Z8 Roadster

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Driveshaft Seal

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T#:362306

Part#: 31507609535

In Stock

12% off MSRP $ 18.20

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$ 15.95 USD

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12% off MSRP

$ 18.20

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$ 15.95 USD

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Front Differential Input Shaft Seal

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T#:594926

Part#: 31521428678

Ships in 1 Business Day

$ 17.99 USD

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$ 17.99 USD

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Seals the input shaft flange to the front differential

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

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$ 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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Front Differential Input Shaft Seal

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T#:485407

Part#: 31527507697

Ships in 1-2 days

7% off MSRP $ 13.99

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

$ 12.99 USD

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7% off MSRP

$ 13.99

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

$ 12.99 USD

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Seals the input shaft flange to the front differential

Genuine BMW Differential - F3x

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T#:226178

Part#: 33107603747

Ships in 4 Business Days

5% off MSRP $ 2,951.99

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

$ 2,800.99 USD

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5% off MSRP

$ 2,951.99

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$ 2,800.99 USD

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TRANSMISSION COVER

For Vehicles Equipped With a Manual Transmission For Vehicles With a Production Date up to 03/2014

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T#:572386

Part#: 33117589964

Ships in 8 Business Days

5% off MSRP $ 176.99

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

$ 167.99 USD

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5% off MSRP

$ 176.99

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

$ 167.99 USD

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Front Differential Input Seal Kit - E46, E53, E60, E61, F30

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T#:41289766

Part#: 31521428678TKT

Back Ordered

$ 51.99

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

$ 50.99 USD

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$ 50.99 USD

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This kit comes with the seal and both dust covers needed to re-seal your vehicles input shaft on the front differential.

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