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BMW Differential and Gearing Upgrades

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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OEM Rein Magnetic Differential Oil Drain Plug - M22x1.5 - Most BMW & ...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:38890943
Part#: HWU0065
In Stock
$ 23.99 USD
Free Shipping on orders $49 and up
$ 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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Front Differential Bushing - Priced Each
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:362591
Part#: 33171090389
In Stock
$ 28.99

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

$ 23.99 USD
Free Shipping on orders $49 and up
$ 23.99 USD
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Meyle HD - Corporate Logo
T#:186967
Part#: 33176751808MY
In Stock
$ 53.99

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

$ 31.49 USD
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$ 31.49 USD
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This is the rear rubber-isolated differential mount. The diff mounts take the bulk of the twisting and binding as power is transmitted through the differential. We use a Meyle HD rubber bushing for the rear mount as it's stronger than the factory part. (33176751808). We also recommend replacing the front differential mount 33171093175MY at the same time.

Meyle is a German brand in business since 1958 and all of their products are TUV approved and meet or exceed ISO standards. Heavy Duty components are designed to provide significantly long lifespans than other aftermarket and stock OE components. Each part includes a 4 year warranty.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 325i 325ci 325xi 328i 328ci 330i 330ci 330xi
2004-2005 E83 BMW X3 2.5i X3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i

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Rear Differential Mount - Front Position
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:594515
Part#: 33316792873
Ships in 1 Business Day
$ 41.99

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

$ 40.99 USD
Free Shipping on orders $49 and up
$ 40.99 USD
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Over time bushings deteriorate and become ineffective. Replace them to reduce noise and harshness. Priced Each. Two required for complete service.

Corteco - Corporate Logo
T#:44021076
Part#: 33121213949
Ships in 1 Business Day
$ 27.99

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

$ 26.99 USD
Free Shipping on orders $49 and up
$ 26.99 USD
Free Shipping on orders $49 and up
Burger Motorsports - Corporate Logo
T#:49822560
Part#: BMSDSBBG
Ships on Aug 31, 2026
New Item
$ 229.00 USD
Free Shipping on orders $49 and up
For G-Chassis BMW & A90/A91 Toyota Supra High torque loads, hard launches, and aggressive driving expose the factory differential mounting’s built-in compliance. Under power, the differential can shift excessively, resulting in wheel hop, inconsistent traction, and increased stress on drivetrain components—issues that become more pronounced on tuned or track-driven cars. The BMS Differential Support Bracket Brace corrects this weakness by reinforcing the differential mounting point and securely tying it to the subframe. By controlling unwanted movement, the brace improves rear-end stability and ensures power is transferred to the ground more efficiently. Why Upgrade? OEM differential mounts favor NVH reduction over control. As torque output increases, that compliance translates into drivetrain shock and lost traction. This brace stiffens the system where it matters most, reducing flex and improving load management under acceleration. Performance Benefits Improved launch consistency Significant reduction in wheel hop Increased rear-end stability under load More precise and predictable power delivery Engineered for Demanding Use Designed around factory mounting points, the BMS Differential Support Bracket delivers precise OE-level fitment with increased structural rigidity. Its robust construction resists deflection under high torque, while upgraded hardware provides greater clamping force for long-term reliability. Fully bolt-on for straightforward installation on both stock and modified vehicles. Key Features Reinforces rear differential mounting Limits differential movement under load Enhances traction and drivetrain response Heavy-duty construction for high-performance applications Bolt-on installation using factory locations Compatible with G-chassis BMW and A90/A91 Supra A focused drivetrain upgrade for drivers who demand consistency, control, and durability at higher performance levels.
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Shaft Seal
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Elring - Corporate Logo
T#:591509
Part#: 11117568263
In Stock
$ 22.99 USD
Free Shipping on orders $49 and up
Ideal for engine repairs or addressing leaks into the transmission bell housing, this shaft seal is designed to be mounted on the engine block's upper and lower halves, facing towards the transmission housing.
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Corteco - Corporate Logo
T#:592386
Part#: 33121205302
In Stock
$ 28.99 USD
Free Shipping on orders $49 and up
$ 28.99 USD
Free Shipping on orders $49 and up
Seals the axles into the differential

OEM Lemforder Differential Rubber Mounting Rear - 33173449082 - E83,E...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Lemforder - Corporate Logo
T#:398994
Part#: 33173449082
Back Ordered
$ 27.99 USD
Free Shipping on orders $49 and up

Bushings tends to wear over time and split or even break free from the internal sleeve, causing excessive movement and sloppy control feel. OEM Lemförder bushings are the perfect option to restore suspension back to day 1 quality.

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMW Chassis:
E83 X3,E85,E86,E89 Z4

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Corteco - Corporate Logo
T#:583459
Part#: 33107505604
In Stock
$ 14.42

This product was last offered at the strikethrough price on
07-06-2026

$ 11.99 USD
Free Shipping on orders $49 and up
$ 11.99 USD
Free Shipping on orders $49 and up
Seals the axles into the differential
Differential Oil Drain Plug
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:27405453
Part#: 33117525064
In Stock
$ 14.99

This product was last offered at the strikethrough price on
08-03-2026

$ 9.99 USD
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$ 9.99 USD
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Rear Axle Rubber Mounting FRONT 33176770788
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Lemforder - Corporate Logo
T#:15674
Part#: 33176770788
In Stock
$ 17.99

This product was last offered at the strikethrough price on
06-08-2026

$ 12.50 USD
Free Shipping on orders $49 and up
$ 12.50 USD
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RUBBER MOUNTING FRONT


Elring - Corporate Logo
T#:54852011
Part#: B16.900
In Stock
New Item
$ 33.99 USD
Free Shipping on orders $49 and up
This high-grade Elring replacement gasket set is engineered for drivers who demand factory-level reliability and zero-compromise sealing performance.
Elring Differential Axle Seal - E30 E36 E28 E34 E24 E23 E32 Z3 ...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Elring - Corporate Logo
T#:369495
Part#: 33107505602
In Stock
$ 9.64 USD
Free Shipping on orders $49 and up

Rubber seals are often hardened and damaged by excessive heat and constant temperature changes causing them to become brittle and crack or split. If your seal has split, replace it with a new Elring seal for long reliability and to prevent further problems.

Elring is one of the biggest OEM names in the manufacturing of high quality gaskets that are available for very affordable prices. Elring has supplied many automotive names for years with the gaskets that seal your car's components from day 1 so you can rest assured that these components will last for a long time to come!

Fits the following BMW engines:
E30 318i/is 325e 325i/ix M3
E36 318i/ic/is/ti 323i/is 325i/is 328i/is M3
E28 524td 528e 533i 535i
E34 525i 530i 535i
E24 633CSi 635CSi
E23 733i 735i
E32 735i/iL
Z3 1.9 2.5 2.5i 2.8 3.0i M Coupe/Roadster

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Corteco - Corporate Logo
T#:594925
Part#: 31507609535
In Stock
$ 9.99 USD
Free Shipping on orders $49 and up
Seals the driveshaft to the differential

OEM Lemforder Rear Differential Bushing - E39
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Lemforder - Corporate Logo
T#:374279
Part#: 33171093008
Ships in 1 Business Day
$ 29.99

This product was last offered at the strikethrough price on
03-10-2026

$ 19.45 USD
Free Shipping on orders $49 and up
$ 19.45 USD
Free Shipping on orders $49 and up

Bushings tends to wear over time and split or even break free from the internal sleeve, causing excessive movement and sloppy control feel. OEM Lemförder bushings are the perfect option to restore suspension back to day 1 quality.

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Corteco - Corporate Logo
T#:594926
Part#: 31521428678
Ships in 1 Business Day
$ 17.99 USD
Free Shipping on orders $49 and up
Seals the input shaft flange to the front differential
Corteco - Corporate Logo
T#:594920
Part#: 33171134872
Ships in 1 Business Day
$ 19.99

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

$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
The subframe provides mounting for your rear suspension. The subframe connects to the body with bushings to absorb vibration at all mounting locations. These bushings absorb any vibration that would normally be transmitted to the cabin and keep the subframe solid. They also provide a solid mounting location to keep everything tight.
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OEM Lemforder Front Differential Bushing - E53 X3
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Lemforder - Corporate Logo
T#:362574
Part#: 33176770457
Ships in 1 Business Day
$ 16.99

This product was last offered at the strikethrough price on
07-15-2026

$ 15.99 USD
Free Shipping on orders $49 and up
$ 15.99 USD
Free Shipping on orders $49 and up

Bushings tends to wear over time and split or even break free from the internal sleeve, causing excessive movement and sloppy control feel. OEM Lemförder bushings are the perfect option to restore suspension back to day 1 quality.

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Rein Differential Drain Plug Gasket
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:19654
Part#: 07119963355
Ships in 3 Business Days
$ 2.03 USD
Free Shipping on orders $49 and up
GASKET RING for various sensors and seals.

Genuine MINI - Corporate Logo
T#:31589336
Part#: 83192405829
Ships in 7 Business Days
8% off MSRP $ 36.99

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

$ 33.99 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 36.99

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

$ 33.99 USD
Free Shipping on orders $49 and up

Elring - Corporate Logo
T#:44767282
Part#: 082.770
Special Order: No Guaranteed ETA
$ 24.99 USD
Free Shipping on orders $49 and up
$ 24.99 USD
Free Shipping on orders $49 and up
Eliminate differential leaks with all new output shaft axle seals from Elring Replaces BMW p/n 33107568368, 33107505605, & 33100152629
Elring - Corporate Logo
T#:54852004
Part#: B46.610
Special Order: No Guaranteed ETA
New Item
$ 14.99 USD
Free Shipping on orders $49 and up
This OEM-quality replacement shaft seal from Elring is the perfect fix for keeping your gear oil where it belongs.
Elring - Corporate Logo
T#:44733256
Part#: 703.190
Special Order: No Guaranteed ETA
$ 34.99 USD
Free Shipping on orders $49 and up
If your differential is leaking fluid from the input shaft at the front of the diff case, there is a good chance this seal is faulty. Replace your leaking seal with this new seal from Elring to prevent further fluid loss and prevent damage to your differential. Replaces BMW p/n 33121213949, 33121212197, & 33121204847
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Rear Differential Bushing - Priced Each
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:375932
Part#: 33171093008
Special Order: No Guaranteed ETA
$ 19.99 USD
Free Shipping on orders $49 and up
Front Differential Bushing - Priced Each
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:36032352
Part#: 33176770788
Special Order: No Guaranteed ETA
$ 15.99 USD
Free Shipping on orders $49 and up
The subframe serves as the mounting point for your rear suspension, connecting to the vehicle's body with bushings designed to absorb vibrations. These bushings minimize vibrations transmitted to the cabin while maintaining a secure and stable connection, ensuring tight and reliable suspension performance.
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OEM Lemforder Rear Subframe Mount, Rear - 33171090089 - E38, E52 Z8 ...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Lemforder - Corporate Logo
T#:398339
Part#: 33171090089
Ships on Jan 15, 2027
$ 19.99 USD
Free Shipping on orders $49 and up

Exposure to the elements and stress/pressure can lead to failing and splitting subframe bushings. Ensure your subframe is mounted perfectly steady to prevent vibrations, knocks, suspension issues, and potential damage to the body of the vehicle or suspension components. OEM Lemforder is the perfect replacement to make sure that everything is mounted properly.

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMW Chassis:
1995-2001 E38 BMW 740i 740iL 750iL
2000 - 2004 E52 BMW Z8 Roadster, Alpina

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Rear Differential Bushing - Priced Each
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:592387
Part#: 33171134872
Back Ordered
$ 18.99 USD
Free Shipping on orders $49 and up

OEM Lemforder Differential Rubber Mounting Front - 33176760287 - E82,...
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Lemforder - Corporate Logo
T#:399012
Part#: 33176760287
Back Ordered
$ 17.16 USD
Free Shipping on orders $49 and up

Bushings tends to wear over time and split or even break free from the internal sleeve, causing excessive movement and sloppy control feel. OEM Lemförder bushings are the perfect option to restore suspension back to day 1 quality.

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This item fits the following BMW Chassis:
E82,E90,E92,E93

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Differential Bushing - Priced Each
We Price Match - Give Us A Call or Chat!
Meyle - Corporate Logo
T#:376612
Part#: 33171131903
Back Ordered
$ 11.99 USD
Free Shipping on orders $49 and up