BMW Drivetrain Parts for BMW 8 Series E31 (1991-1997)

Clear BMW chassis

Please ensure your correct model is selected

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.

Sub-Categories

Sort By:

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
Free Shipping on orders $49 and up
Sale - Save 25%
$ 32.99

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

$ 24.74 USD
Free Shipping on orders $49 and up
The proper size for removing BMW drain plugs.
ECS - Corporate Logo
T#:364033
Part#: 013236ECS01A
In Stock
Sale - Save 25% $ 56.99

This product was last offered at the strikethrough price on
06-13-2026

$ 42.74 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 56.99

This product was last offered at the strikethrough price on
06-13-2026

$ 42.74 USD
Free Shipping on orders $49 and up
This brass clutch pivot pin is an upgrade over the stock plastic pivot pin. The brass pin will last a lot longer than the plastic piece and may save you time and hassle later on. The original plastic pivot pin is known to fall out, snap, or just wear out over time. At the least you get a very annoying squeak every time you depress the clutch. In a worse case scenario, the clutch fork won't be able to push on the throw-out bearing and your clutch will be useless. The only time to replace the clutch pivot pin is when the transmission is removed, so this brass upgrade can be installed during clutch replacements or a rear main seal service.
Show More Show Less
ECS - Corporate Logo
T#:366828
Part#: 009314ECS01A
In Stock
Sale - Save 25% $ 62.99

This product was last offered at the strikethrough price on
06-13-2026

$ 47.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 62.99

This product was last offered at the strikethrough price on
06-13-2026

$ 47.24 USD
Free Shipping on orders $49 and up
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
Show More Show Less

ECS - Corporate Logo
T#:36472759
Part#: 055182LA01-02
In Stock
Sale - Save 25% $ 33.99

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

$ 25.49 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 33.99

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

$ 25.49 USD
Free Shipping on orders $49 and up

The ECS Billet Master Cylinder Fitting is the ultimate solution for a notorious failure point in BMW E30 clutch systems. This critical fitting, located at the end of the master cylinder reservoir hose, is responsible for delivering hydraulic fluid to the clutch master cylinder inlet. Unfortunately, the OEM plastic fitting is prone to degradation after prolonged exposure to brake fluid, often leading to total hydraulic pressure loss and brake fluid leaks inside your vehicle.

ECS has addressed this issue by engineering a robust and long-lasting alternative. Crafted from 6061 billet aluminum and finished with black hard-coat anodizing for superior corrosion resistance, this precision-machined fitting replaces the fragile plastic original, ensuring leak-free performance for the lifetime of your vehicle. Upgrade to our Billet Master Cylinder Fitting during your next clutch master cylinder service and enjoy peace of mind knowing your BMW is equipped with a durable, high-quality solution.

Features & Benefits:

Made from 6061 billet aluminum for a permanent, reliable upgrade over the factory plastic fitting. Black hard-coat anodized finish ensures long-lasting protection against the elements. Precision-machined barbs match OEM dimensions for a leak-free seal with Genuine and aftermarket master cylinders. Designed for a secure fit within the factory grommet location. Prevents brake fluid leaks and loss of clutch hydraulic pressure caused by plastic fitting failure. Upgrade your BMW and bulletproof your master cylinder with the ECS Billet Aluminum Master Cylinder Fitting. Ensure clutch hydraulic system reliability and enjoy peace of mind knowing your failure-prone plastic master cylinder fitting has been addressed.

Show More Show Less

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
Free Shipping on orders $49 and up
Sale - Save 3%
$ 21.99

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

$ 21.33 USD
Free Shipping on orders $49 and up

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.

Show More Show Less
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
Free Shipping on orders $49 and up
Sale - Save 25%
$ 36.99

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

$ 27.74 USD
Free Shipping on orders $49 and up
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

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
Free Shipping on orders $49 and up
Sale - Save 22%
$ 89.99

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

$ 70.42 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
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
Free Shipping on orders $49 and up
Sale - Save 25%
$ 38.99

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

$ 29.24 USD
Free Shipping on orders $49 and up
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.
Show More Show Less

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
Free Shipping on orders $49 and up
Sale - Save 10%
$ 47.99

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

$ 43.19 USD
Free Shipping on orders $49 and up
Used to remove corrosion and ensure brake rotors, wheel spacers, etc sit flush on your hubs

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
Free Shipping on orders $49 and up
Sale - Save 10%
$ 40.99

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

$ 36.89 USD
Free Shipping on orders $49 and up
For use with B8800120 (Hub Puller Adapter) as an impact driver to aid in removal of stuck CV axle shafts.
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
Free Shipping on orders $49 and up
Sale - Save 15%
$ 60.99

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

$ 51.84 USD
Free Shipping on orders $49 and up
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.
Show More Show Less
Bav Auto Tools - Corporate Logo
T#:580427
Part#: B8800120
In Stock
Sale - Save 10% $ 109.99

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

$ 98.99 USD
Free Shipping
Sale - Save 10%
$ 109.99

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

$ 98.99 USD
Free Shipping
For use with B8800122 impact driver to remove stuck CV axle shafts.


Bav Auto Tools - Corporate Logo
T#:580333
Part#: B8800001
In Stock
Sale - Save 15% $ 171.99

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

$ 146.19 USD
Free Shipping
Sale - Save 15%
$ 171.99

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

$ 146.19 USD
Free Shipping
Change your oil without getting underneath the vehicle! This oil extractor pulls the oil out of your engine through the dip stick tube.
Bav Auto Tools - Corporate Logo
T#:580402
Part#: B8800092
Ships on Sep 1, 2026
Sale - Save 5% $ 355.99

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

$ 338.19 USD
Sale - Save 5%
$ 355.99

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

$ 338.19 USD
For removal and installation of pressed in rear wheel bearings on most BMW's and pressed in front wheel bearing on many all-wheel drive BMWs.
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
Free Shipping on orders $49 and up
Sale - Save 25%
$ 29.99

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

$ 22.49 USD
Free Shipping on orders $49 and up
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.

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
Free Shipping on orders $49 and up
Sale - Save 25%
$ 19.99

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

$ 14.99 USD
Free Shipping on orders $49 and up
Makes changing your transmission fluid an easy task. 1/2 " drive, for use in BMWs with 17mm female allen transmission drain plugs.

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
Limited Qty Sale
Free Shipping on orders $49 and up
Sale - Save 18%
$ 21.99

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

$ 17.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Necessary in order to use Bav Auto's Hub Adapter/Puller (B8800120) . 5/8" x 18T UNF thread.