Home
Drivetrain

BMW Drivetrain Parts for BMW Z Series E85/6 (2003-2008)

Clear BMW chassis

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:

Differential And LSD Tune

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

T#:34382136

Part#: BM237HAKT

Ships in 2 Business Days

$ 2,100.00 USD

Add to Wish List

Qty

$ 2,100.00 USD

Add to Wish List

Upgrade to a better performing LSD, includes tune.

E46 M3, E9X M3, E34 M5, E39 M5, Z4 M OS Giken Super Lock Limited Slip...

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

T#:1387

Part#: BM237-HA

Ships in 2 Business Days

$ 1,950.00 USD

Add to Wish List

Qty

$ 1,950.00 USD

Add to Wish List

The M Dynamic limited slip unit on the M3 is designed to be a pure street car differential. It's simply not up to the rigors of professional or amateur racing. The OS Giken Super Lock LSD is giant step up in from a stock M3 lsd unit. It's ready for the extreme conditions of racing, offers 100% progressive locking capability, and is able to do this while operating smoothly and quietly. It's use of advanced technologies that make it perfect for both street cars AND pro race cars... and everything in between. We're excited to be carrying the OS Giken LSD unit in our performance catalog, as we've been using them in our own Championship winning M3 race cars.

OS Giken incorporated revolutionary new ideas when developing the their own limited slip diff, utilizing their accumulated racing knowledge and experience and over 4 years of development. Their design uses an unprecedented number of friction plates (up to 28 total!) for better locking force, better engagement/disengagement, and less generated heat. The end result of their efforts is the OS Giken's OS Super Lock LSD which offers incredible durability and reliability on street and track driven BMWs. The use of highest quality materials, precise machining, forged gears and sound engineering makes this LSD durable and reliable enough for road racing performance (which we can personally vouch for!). This is such a great design, in that it can be used in any situation -- whether it's for a street car, or a 100% Professional race car. Zero break-in required. Super smooth and quiet engagement, and 100% progressive locking capability. Professional installation is recommended.

This Limited Slip Differential Unit fits the following BMWs:
2001-2006 E46 M3 coupe & convertible
2008-2013 E9X M3 coupe & convertible
1991-1995 E34 M5 sedan
1999-2003 E39 M5 sedan
2006-2008 E85 Z4M Z4 M Coupe, Z4 M Roadster

Show More Show Less

Elring Selector Shaft Seal - E36, E39, E46, E36 Z3

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:340660

Part#: 23121222677

In Stock

$ 5.14 USD

Add to Wish List

Qty

$ 5.14 USD

Add to Wish List

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's:
E36, E39, E46, E36 Z3

Show More Show Less

Shaft Seal - Differential (Axle Drive)

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

T#:54852004

Part#: B46.610

In Stock

$ 14.99 USD

Add to Wish List

Qty

$ 14.99 USD

Add to Wish List

This OEM-quality replacement shaft seal from Elring is the perfect fix for keeping your gear oil where it belongs.

Elring Automatic Transmission Oil Pan Gasket - E39, E46, Z4

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!

T#:592101

Part#: 24101423380

In Stock

$ 16.99

This product was last offered at the strikethrough price on
02-05-2026

$ 8.15 USD

Add to Wish List

Qty

$ 8.15 USD

Add to Wish List

Seal up your leaking oil pan.

LSD Tune For OS Giken Differential

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

T#:34382134

Part#: LSD-TUNE

Ships in 2 Business Days

$ 150.00 USD

Add to Wish List

Qty

$ 150.00 USD

Add to Wish List

Automatic Transmission Seals And O-Rings Kit

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

T#:54744782

Part#: 821.450

In Stock

$ 174.99 USD

Add to Wish List

Qty

$ 174.99 USD

Add to Wish List

This Elring Automatic Transmission Gasket Set replaces your tired, heat-cycled internal seals with premium-grade elastomer components.

Elring Differential Input Shaft Seal - 50x80x9mm - BMW E82 1M, E46 M3...

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

T#:44733256

Part#: 703.190

Special Order: No Guaranteed ETA

$ 34.99 USD

Add to Wish List

Qty

$ 34.99 USD

Add to Wish List

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

Show More Show Less

Automatic Transmission Oil Pan And Filter Kit

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

T#:45005575

Part#: B01.650

Special Order: No Guaranteed ETA

$ 166.99 USD

Add to Wish List

Qty

$ 166.99 USD

Add to Wish List

Over the life of a vehicle, the transmission can often be overlooked when performing routine maintenance. If left unserviced, the automatic transmission fluid will break down, causing the valve body and filter to become contaminated with deposits and sludge. This will lead to poor shifting, slipping, and ultimately, transmission failure. This replacement pan and filter kit is the perfect replacement for your GA6HP19Z transmission.

Show More Show Less

Select Vehicle

Purpose

Category

Home

Drivetrain
- Differential and Gearing Upgrades (5)
- Transmission (4)

Brand

View All Brands

Price

Special Offers

New (2)

Shipping