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BMW Differential and Gearing Upgrades for BMW 4 Series F32 (2014+)

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

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

T#:1997

Part#: TDR9080BD2

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Sale - Save 15% $ 372.99

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

$ 317.04 USD

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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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Turner Motorsport - Delrin Solid Subframe/Differential Mount Kit - F2...

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

T#:402005

Part#: TDR9080BD2KT

In Stock

Sale - Save 5% $ 927.99

This product was last offered at the strikethrough price on
06-14-2026

$ 881.58 USD

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Sale - Save 5%

$ 927.99

This product was last offered at the strikethrough price on
06-14-2026

$ 881.58 USD

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Modern BMW's are beginning to leave the performance derived handling and power delivery in the past as the demand for more comfort and features rises. The stiff suspension components designed around having the best driving experience from a luxury car has been left for the M models and replaced with soft rubber bushings and mounts. Unfortunately, this is a good move by BMW to support the masses.

The obvious approach was to offer products so the modern BMW can be upgraded into the car the enthusiast desires, superb handling, control, and a direct delivery of power to the rear wheels. When you upgrade to our Delrin subframe mounts you reconnect that power with almost zero negative feedback.

The added appeal to someone looking to take one of these machines on the race track is Delrin can be used when solid mounts are needed and aluminum is not an option with strict regulations found in??Grand-Am, BMW CCA, and other racing series.

Product features:

Precision machined Delrin(TM) 150 bushings.
Precision machined 6061-T6 aluminum inserts.?
Class legal for any racing class that does not allow a solid subframe bushing.?

Performance Benefits:

Eliminates subframe movement for more direct throttle and suspension? response.?
Minimizes wheel hop due to subframe deflection and movement.?

***Installation Instructions***

These GAC differential bushings/mounts fit the following BMWs:?
2014+?F22 BMW?228i 228iX M235i M235iX?
2012+?F30 BMW?320i 320iX 328i 328iX 335i 335iX - Sedan?
2014+?F34 BMW?328i 328iX 335iX - Gran Turismo?
2014+?F32 BMW?428i 428iX 435i 435iX - Coupe?
2014+?F33 BMW?428i 428iX 435i 435iX - Convertible

2014+?F36?BMW?428iX -Gran Coupe?

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

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

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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Powerflex Rear Differential Mount Inserts - Front Position - F22 F30 ...

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

T#:640909

Part#: PFR5-1927

Back Ordered

$ 68.99 USD

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$ 68.99 USD

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Fits into the voids of OE bushings: 33316792513 Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged. By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. Powerflex Black Series bushings are the ultimate in track and race bushings. Featuring 95A durometer polyurethane, Black Series bushings are 25% stiffer than street bushings. Engineered to perform, Powerflex performance polyurethane control arm bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings. Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers.

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Genuine BMW M Performance Limited Slip 2.81 Differential - F22/23 F3X...

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

T#:402424

Part#: 33108659989

In Stock

Sale - Save 8% $ 3,310.99

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

$ 3,062.09 USD

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Sale - Save 8%

$ 3,310.99

This product was last offered at the strikethrough price on
06-25-2026

$ 3,062.09 USD

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Ensure your getting all the power you can to the road with this LSD from BMW Performance

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

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

T#:656153

Part#: 026696ECS10

In Stock

Sale - Save 20% $ 235.99

This product was last offered at the strikethrough price on
06-14-2026

$ 188.79 USD

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Sale - Save 20%

$ 235.99

This product was last offered at the strikethrough price on
06-14-2026

$ 188.79 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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TRANSMISSION COVER

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

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

T#:572386

Part#: 33117589964

Ships in 7 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.

$ 168.99 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.

$ 168.99 USD

Add to Wish List

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BMW Differential and Gearing Upgrades for BMW 4 Series F32 (2014+)

Sub-Categories

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

Turner Motorsport - Delrin Solid Subframe/Differential Mount Kit - F2...

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

Powerflex Rear Differential Mount Inserts - Front Position - F22 F30 ...

Genuine BMW M Performance Limited Slip 2.81 Differential - F22/23 F3X...

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

TRANSMISSION COVER

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