Home
Drivetrain
Differential and Gearing Upgrades

BMW Differential and Gearing Upgrades for BMW 1 Series E82 (2008-2013)

Clear BMW chassis

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.

Sub-Categories

Sort By:

Turner Titanium Magnetic Differential Drain Plug - M22x1.5

10X Entries Into Our F80 M3 Sweepstakes

T#:593924

Part#: 027030TMS01

In Stock

Sale - Save 25% $ 89.99

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

$ 67.49 USD

Add to Wish List

Qty

Sale - Save 25%

$ 89.99

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

$ 67.49 USD

Add to Wish List

When both extreme-duty protection and saving every gram matters: the Turner Magnetic Differential Drain Plug.

OEM Rein Magnetic Differential Oil Drain Plug - M22x1.5 - Most BMW & ...

2X Entries Into Our F80 M3 Sweepstakes

T#:38890943

Part#: HWU0065

In Stock

$ 23.99 USD

Add to Wish List

Qty

$ 23.99 USD

Add to Wish List

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

Show More Show Less

Loctite 5970 Gasket/Sealing Compound - 50ml

T#:25772539

Part#: 5970

Ships in 2 Business Days

$ 55.31 USD

Add to Wish List

Qty

$ 55.31 USD

Add to Wish List

This Loctite 5970 Sealant is recommended by BMW to be used to seal the rear differential cover and numerous engine oil pans. Also used for multiple MINI, Audi, and VW applications.

Differential - mount bushing

T#:26938502

Part#: KDT919

In Stock

$ 96.99 USD

Add to Wish List

Qty

$ 96.99 USD

Add to Wish List

After thorough development and material testing aimed at achieving strength, durability, geometry retention, and memory without compromising comfort, WHITELINE has introduced a progressive, long-chain Synthetic Elastomer. This groundbreaking material combines the advantages of solid bushings with the flexibility characteristics of rubber, striking an optimal balance between performance and comfort.

Show More Show Less

Rear Differential Service Kit for various BMW Models

10X Entries Into Our F80 M3 Sweepstakes

T#:42133544

Part#: 835225790TKT

In Stock

$ 60.11 USD

Add to Wish List

Qty

$ 60.11 USD

Add to Wish List

The kit includes 2 Quarts of Red line 75w90 - 57904 and brand new Rein rear diff oil drain plug M22x1.5

Differential Service Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15710761

Part#: 33117525064-KT

In Stock

Sale - Save 1% $ 100.76

This product was last offered at the strikethrough price on
06-15-2026

$ 99.48 USD

Add to Wish List

Qty

Sale - Save 1%

$ 100.76

This product was last offered at the strikethrough price on
06-15-2026

$ 99.48 USD

Add to Wish List

Often overlooked, scheduled rear differential service is very important. Over time gear lube breaks down causing bearings and internal components fail. Regular maintenance will keep your vehicle running properly for years to come. Kit includes 3 Bottles of Castrol SAF-XJ 75w140 2 Drain plugs

Show More Show Less

Victor Reinz Shaft Seal - E38, E39, E60, E61, E63, E64, E65, E82, E88...

T#:362359

Part#: 33107505605

Ships in 1 day

$ 29.99

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

$ 28.99 USD

Add to Wish List

Qty

$ 28.99 USD

Add to Wish List

Seals the axle into the differential

ECS & Turner Performance Drivetrain Bushing Package - E82/88 E9X N52 ...

10X Entries Into Our F80 M3 Sweepstakes

T#:24344778

Part#: ECSTMSPDBKT

In Stock

Sale - Save 8% $ 1,190.99

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

$ 1,096.14 USD

Add to Wish List

Qty

Sale - Save 8%

$ 1,190.99

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

$ 1,096.14 USD

Add to Wish List

Turner recommends running drivetrain mounts of all the same variety - if you are using poly engine mounts, you should also use poly transmission mounts. This kit is your solution to make sure all components of your vehicle are working with each other to achieve the performance you're looking for. Polyurethane material is more resistant to water, ozone, and chemicals, maintaining its resiliency and elasticity longer than conventional rubber. Keep your vehicle planted for spirited driving while having crisper throttle response and reduce drivetrain movement along with wheel hop. Kit includes: Turner Engine Mount Set - 60A Polyurethane ECS Transmission Mount Set - Street 70A Polyurethane ECS Differential Bushing Set - 95A Polyurethane ECS Subframe Mount Set - 95A - Polyurethane

Show More Show Less

Differential Oil Drain Plug

2X Entries Into Our F80 M3 Sweepstakes

T#:27405453

Part#: 33117525064

Ships in 2 Business Days

$ 14.99 USD

Add to Wish List

Qty

$ 14.99 USD

Add to Wish List

Differential Service Kit

10X Entries Into Our F80 M3 Sweepstakes

T#:15744025

Part#: 331175250640-KT

In Stock

$ 274.99

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

$ 274.82 USD

Add to Wish List

Qty

$ 274.82 USD

Add to Wish List

Often overlooked, scheduled rear differential service is very important. Over time gear lube breaks down causing bearings and internal components fail. Regular maintenance will keep your vehicle running properly for years to come. Three bottle of Genuine BMW Limited Slip Gear Lube 1 New Genuine BMW Drain/Fill plugs 1 ECS Magnetic Differential Oil Drain Plug Drain plug O-ring

Show More Show Less

Complete Performance Polyurethane Differential And Subframe Bushing S...

10X Entries Into Our F80 M3 Sweepstakes

T#:56038061

Part#: E9XSBFRDFFBKT2

In Stock

$ 491.99 USD

Add to Wish List

Qty

$ 491.99 USD

Add to Wish List

This complete upgrade package is designed to put an end to steering slop. Utilizing a high performance 95A durometer polyurethane formulation, this kit replaces the mushy OEM rubber with proven rigidity.

Show More Show Less

Elring Differential Output Shaft Seal - BMW E82 E9X Z4 E39 E60 E63/64...

2X Entries Into Our F80 M3 Sweepstakes

T#:44767282

Part#: 082.770

Special Order: No Guaranteed ETA

$ 24.99 USD

Add to Wish List

Qty

$ 24.99 USD

Add to Wish List

Eliminate differential leaks with all new output shaft axle seals from Elring Replaces BMW p/n 33107568368, 33107505605, & 33100152629

Limited Slip Differential With Output Shaft Seal - 188 (Small Diff Ho...

10X Entries Into Our F80 M3 Sweepstakes

T#:55965861

Part#: 30309175WKWVTKT2

Ships in 10 Business Days

$ 1,269.99 USD

Add to Wish List

Qty

$ 1,269.99 USD

Add to Wish List

This AutoTech LSD Upgrade Kit pairs AutoTech’s highly engineered 188mm limited-slip differential carrier with a pair of Corteco output shaft seals, giving you everything you need for a leak-free install.

Show More Show Less

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

2X Entries Into Our F80 M3 Sweepstakes

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

Shaft Seal - Differential (Axle Drive)

2X Entries Into Our F80 M3 Sweepstakes

T#:54852004

Part#: B46.610

Special Order: No Guaranteed ETA

$ 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.

Select Vehicle

Purpose

Category

Differential and Gearing Upgrades

Brand

View All Brands

Price

Special Offers

Shipping