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BMW Drivetrain Parts

Building your perfect BMW is more than just adding horsepower and stiff suspension. Your drivetrain needs attention in order to deliver power effectively. Most BMWs feature comfortable clutch discs, heavy flywheels, long shifter throws, and open differentials. The drivetrain transmits power to the wheels, but can also be a source of power loss when it is designed for comfort rather than performance. Everything on this page will help you improve your power delivery and driving experience by providing custom Limited Slip Differentials, Short Shift Conversions, Performance Clutch Discs, Lightweight Flywheels, and anything else your BMW needs to be the perfect driving experience.

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Bav Auto Differential, Transfer Case, Transmission Oil-Pan Wrench
Bav Auto Differential, Transfer Case, Transmission Oil-Pan Wrench ...
Bav Auto Tools - Corporate Logo
T#:580353
Part#: B8800025
In Stock
Sale - Save 25% $ 32.99

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

$ 24.74 USD
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$ 32.99

This product was last offered at the strikethrough price on
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The proper size for removing BMW drain plugs.
Differential Fluid Extraction Adapter
Differential Fluid Extraction Adapter
Bav Auto Tools - Corporate Logo
T#:578659
Part#: B3300000
In Stock
Sale - Save 3% $ 21.99

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

$ 21.33 USD
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$ 21.99

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Differential Fluid Extraction Adapter is an essential tool for efficiently draining and refilling differential fluid, ensuring your vehicle's differential system remains in optimal condition. Designed to work with most extraction pumps, this adapter simplifies maintenance tasks, making it easier to service your differential without the mess or hassle of traditional methods.

  • Efficient fluid extraction: Allows for quick and clean draining of differential fluid.
  • Versatile compatibility: Works with most extraction pumps, offering flexibility for various vehicle makes and models.
  • Hassle-free maintenance: Simplifies the process of refilling and draining differential fluid, reducing time and effort.
  • Durable construction: Built from high-quality materials to withstand frequent use and harsh conditions.
  • Easy installation: Designed for a secure fit and easy attachment to extraction pumps.

This Differential Fluid Extraction Adapter is a must-have for any vehicle owner looking to maintain the longevity and performance of their differential system.

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Bav Auto Transmission/Differential Drain Plug Socket Set
Bav Auto Transmission/Differential Drain Plug Socket Set
Bav Auto Tools - Corporate Logo
T#:580446
Part#: B8800141
In Stock
Sale - Save 25% $ 36.99

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

$ 27.74 USD
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$ 36.99

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

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Drain plug socket set. Set of 3 hex-head sockets make removal of transmission and differential drain plugs so much easier. Includes 10mm, 14mm and 17mm sizes. 3/8" drive
Clutch Slave Cylinder Bleeder Tool
Clutch Slave Cylinder Bleeder Tool
Bav Auto Tools - Corporate Logo
T#:585675
Part#: CBTTOOL
In Stock
Sale - Save 22% $ 89.99

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

$ 70.42 USD
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$ 89.99

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

$ 70.42 USD
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Bleed your slave cylinder with confidence using this clutch slave cylinder bleeder tool. Get the job done right the first time and assure that your clutch pressure is appropriate. Use the tools' adjustable piston rod to apply pressure to the cylinders' piston rod, making the process much simpler.
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Bav Auto Fluid Transfer Pump - 200ml - Viton Seals
Bav Auto Fluid Transfer Pump - 200ml - Viton Seals
Bav Auto Tools - Corporate Logo
T#:580336
Part#: B8800004
In Stock
Sale - Save 25% $ 38.99

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

$ 29.24 USD
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$ 38.99

This product was last offered at the strikethrough price on
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$ 29.24 USD
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Use this high-quality fluid transfer pump to remove old fluid from power steering reservoirs, brake fluid reservoirs or differentials that do not have drain plugs (as on many later model BMWs), or to fill transmissions, differentials, and any other assemblies when changing the fluids.
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Bav Auto Wheel Hub and Rotor Grinding Kit
Bav Auto Wheel Hub and Rotor Grinding Kit
Bav Auto Tools - Corporate Logo
T#:580437
Part#: B8800132
In Stock
Sale - Save 10% $ 47.99

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

$ 43.19 USD
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$ 47.99

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

$ 43.19 USD
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Used to remove corrosion and ensure brake rotors, wheel spacers, etc sit flush on your hubs
Bav Auto Axle Shaft Impact Force Screw Adapter
Bav Auto Axle Shaft Impact Force Screw Adapter
Bav Auto Tools - Corporate Logo
T#:580429
Part#: B8800122
In Stock
Sale - Save 10% $ 40.99

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

$ 36.89 USD
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$ 40.99

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For use with B8800120 (Hub Puller Adapter) as an impact driver to aid in removal of stuck CV axle shafts.
Bav Auto Fluid Transfer Pump - 1 Liter - Viton Seals
Bav Auto Fluid Transfer Pump - 1 Liter - Viton Seals
Bav Auto Tools - Corporate Logo
T#:580335
Part#: B8800003
In Stock
Sale - Save 15% $ 60.99

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

$ 51.84 USD
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$ 60.99

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Use this high-quality fluid transfer pump to remove old fluid from power steering reservoirs, brake fluid reservoirs or differentials that do not have drain plugs (as on many later model BMWs), or to fill transmissions, differentials, and any other assemblies when changing the fluids. For draining differentials we recommend using the Bavarian Autosport adapter part # B3300000.
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Bav Auto Wheel Hub Puller / Axle Press - 4 lug bolt - BMW & MINI
Bav Auto Wheel Hub Puller / Axle Press - 4 lug bolt - BMW & MINI ...
Bav Auto Tools - Corporate Logo
T#:580367
Part#: B8800043
In Stock
Sale - Save 15% $ 37.99

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

$ 32.29 USD
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$ 37.99

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Use this tool to press the splined axle end out of the wheel flange or hub on rear-wheel drive and front-wheel drive 4 LUG BMWs and MINIs. This tool is also used to pull the front wheel bearing hub on 2-wheel drive BMW models with sealed bearing and hub assemblies.
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Bav Auto 36MM 12 Point Socket - 1/2" Drive
Bav Auto 36MM 12 Point Socket - 1/2" Drive
Bav Auto Tools - Corporate Logo
T#:580421
Part#: B8800114
In Stock
Sale - Save 25% $ 29.99

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

$ 22.49 USD
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$ 22.49 USD
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This is a thin-walled 1/2" drive 36mm impact socket - useful in removing or installing wheel bearing and axle nuts on several BMW models.
AAE Remanufactured Transfer Case Assembly - BMW E84 X1 xDrive35i
AAE Remanufactured Transfer Case Assembly - BMW E84 X1 xDrive35i ...
Atlantic Automotive Engineering - Corporate Logo
T#:42705796
Part#: GBA-59281KT
Ships in 4 Business Days
$ 2,563.99 USD
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$ 2,563.99 USD
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These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
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Bav Auto Transmission 17mm Drain Plug Wrench - Manual Transmission
Bav Auto Transmission 17mm Drain Plug Wrench - Manual Transmission ...
Bav Auto Tools - Corporate Logo
T#:580447
Part#: B8800142
In Stock
Sale - Save 25% $ 19.99

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

$ 14.99 USD
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$ 19.99

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Makes changing your transmission fluid an easy task. 1/2 " drive, for use in BMWs with 17mm female allen transmission drain plugs.
Bav Auto Hub Puller Slide Hammer Adapter
Bav Auto Hub Puller Slide Hammer Adapter
Bav Auto Tools - Corporate Logo
T#:580428
Part#: B8800121
In Stock
Sale - Save 18% $ 21.99

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

$ 17.99 USD
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Sale - Save 18%
$ 21.99

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

$ 17.99 USD
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Necessary in order to use Bav Auto's Hub Adapter/Puller (B8800120) . 5/8" x 18T UNF thread.
AAE Remanufactured Transfer Case Assembly - BMW F22/23 F3X F07/10 F06/12/13 F01/02
AAE Remanufactured Transfer Case Assembly - BMW F22/23 F3X F07/10 F06...
Atlantic Automotive Engineering - Corporate Logo
T#:42705795
Part#: GBA-59251KT
Ships in 4 Business Days
$ 2,563.99 USD
Free Shipping on orders $49 and up
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$ 2,563.99 USD
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These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
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AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW F22/23 F3X F07/10 F06/12/13 F01/02
AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW F22...
Atlantic Automotive Engineering - Corporate Logo
T#:42705799
Part#: GBA-59251MKT
Ships in 4 Business Days
$ 3,519.99 USD
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$ 3,519.99 USD
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These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
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AAE Remanufactured Transfer Case Assembly - BMW F22/23 F3X F10
AAE Remanufactured Transfer Case Assembly - BMW F22/23 F3X F10 ...
Atlantic Automotive Engineering - Corporate Logo
T#:42705797
Part#: GBA-59260KT
Ships in 4 Business Days
$ 2,563.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 2,563.99 USD
Free Shipping on orders $49 and up
Add to Wish List
These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
Show More Show Less
AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW F22/23 F3X F10
AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW F22...
Atlantic Automotive Engineering - Corporate Logo
T#:42705800
Part#: GBA-59260MKT
Ships in 4 Business Days
$ 3,519.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 3,519.99 USD
Free Shipping on orders $49 and up
Add to Wish List
These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
Show More Show Less
AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW E84 X1 xDrive35i
AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW E84...
Atlantic Automotive Engineering - Corporate Logo
T#:42705802
Part#: GBA-59281MKT
Ships in 4 Business Days
$ 3,519.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 3,519.99 USD
Free Shipping on orders $49 and up
Add to Wish List
These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
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AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW E84 X1 xDrive28i
AAE Remanufactured Transfer Case Assembly w/ Electric Motor - BMW E84...
Atlantic Automotive Engineering - Corporate Logo
T#:42705801
Part#: GBA-59280MKT
Ships in 4 Business Days
$ 3,519.99 USD
Free Shipping on orders $49 and up
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$ 3,519.99 USD
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These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
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Lightweight Aluminum Flywheel - BMW E30 325i/x M20
Lightweight Aluminum Flywheel - BMW E30 325i/x M20
JB Racing - Corporate Logo
T#:5774217
Part#: 520-065-228
Ships on Aug 11, 2026
$ 630.00 USD
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$ 630.00 USD
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Aluminum flywheels are much lighter than the stock steel flywheel and that produces better throttle response and more available horsepower to the wheels for faster acceleration. The JB Racing aluminum flywheels are a direct replacement for the stock flywheel and work with stock clutch components for an easy upgrade with very little downside.
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JB Racing Lightweight Steel Flywheel - Grand-Am Legal - E46, MZ3, Z4
JB Racing Lightweight Steel Flywheel - Grand-Am Legal - E46, MZ3, Z4 ...
JB Racing - Corporate Logo
T#:40748575
Part#: 520010240SGA
Ships on Aug 11, 2026
$ 868.00 USD
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$ 868.00 USD
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This lightened steel flywheel is specifically designed (and approved) for use in Grand-Am road racing but can also be used as a mild street upgrade if a full aluminum lightweight flywheel is not called for. The Grand-Am flywheel is 20% lighter than stock to meet the rules for the GS and ST classes.Modern flywheels are built with additional components and features that are designed to dampen and minimize vibrations from the engine and transmission. As a result they have become bloated in weight and that means more energy is used up just making the flywheel spin. A lightweight flywheel does away with the dual mass design and its additional mass so more energy can be diverted to where it counts most - moving the car. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines. The dampening effect is just not needed on cars that are focused on performance.

In addition to releasing more power to the wheels, the lighter flywheel allows the engine to spin more freely, which improves throttle response. The engine revs much faster than before. With the engine spinning easier the power band comes up much sooner. The stock steel flywheel feels lazy in comparison. There is a driving adjustment required to get used to how much faster the engine revs but that's not really a downside.

Grand-Am approved this flywheel to be used with a factory E36 M3 clutch. This opens up a lot of clutch and pressure plate options but we typically used this with a stock Sachs OEM clutch kit. This makes replacement clutch components easy to source and inexpensive when compared to specialized racing clutches.

Lightweight flywheels are considered 'single-mass' flywheels because they do not have the same dampening designs as an original 'dual-mass' flywheel. With a single-mass design more noise and vibration may be noticeable. There are steps you can take to minimize the noise - heavier weight transmission oil and clutch discs with anti-rattle springs (sprung-hub clutch). In addition to the standard replacement clutches, we also sell Sachs Performance sprung hub clutches that also work with the JB flywheels.

If being used on a 330i 6-speed or Z4 6-speed an additional pilot bearing hub is required. Select your appropriate model and transmission from the list below.

Stock Flywheel Weight = 25.0lbs
JB Flywheel Weight = 20.0lbs

This item fits the following BMWs:
2001-2002 E46 BMW 330i 330ci 5-speed
2003-2006 E46 BMW 330i 330ci 6-speed
2001-2006 E46 BMW M3
1998-2002 Z3 BMW Z3 M Roadster M Coupe
2003-2005 E85 BMW Z4 2.5i Z4 3.0i
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AAE Remanufactured Transfer Case Assembly - BMW E84 X1 xDrive28i
AAE Remanufactured Transfer Case Assembly - BMW E84 X1 xDrive28i ...
Atlantic Automotive Engineering - Corporate Logo
T#:42705798
Part#: GBA-59280KT
Ships in 4 Business Days
$ 2,563.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 2,563.99 USD
Free Shipping on orders $49 and up
Add to Wish List
These transfer cases are fully disassembled, cleaned, and remanufactured to meet or exceed OE specifications using OEM components. High-wear parts such as bearings, seals, gaskets, clutches, plastic components, and mounts are replaced, ensuring consistent and reliable performance.
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