Find Parts That Fit Your Vehicle

BMW Differential and Gearing Upgrades

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:

2-Piece Rear Subframe Bushing - Rear Position (95A) - F8x, G8x ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Turner Motorsport - Corporate Logo
T#:53326250
Part#: 056755LAKT
In Stock
New Item
$ 104.98

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

$ 100.98 USD
Free Shipping on orders $49 and up
$ 100.98 USD
Free Shipping on orders $49 and up

Enhance rear-end control and put more power to the ground with a straightforward 3-piece design that installs with ease. The factory rubber may favor ride comfort, but it struggles to keep up when driving gets aggressive. As it wears, the OEM bushing can soften and deform, reducing stability and allowing wheel hop to creep in when you need traction most.

Our 95A durometer polyurethane bushings solve that problem. Engineered to strike the perfect balance between soft factory rubber and harsh solid mounts, they significantly reduce differential movement without introducing excessive vibration. The result is more efficient power transfer, so your torque goes straight to the rear wheels instead of being lost in drivetrain flex.

Features & Benefits:

Minimizes differential movement and instability to help eliminate wheel hop
Two-piece 95A split polyurethane design for easier installation
Precision-fit insert reinforces the bushing and strengthens mounting points
Resistant to road salt, oils, and harsh chemicals
Compatible with dual mount differential plates
Design:

Type II Anodized 6061-T6 CNC billet aluminum inserts for superior corrosion resistance and durability.
95A Polyurethane 2-Piece Isolator.
Product Development:

Our Rear Differential Bushings are designed, engineered, tested, and quality inspected by our Research & Development team. Our development process includes leading-edge product technology: FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.

Show More Show Less
BMS Differential Support Bracket Brace For G Chassis BMW/Supra ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Burger Motorsports - Corporate Logo
T#:49822560
Part#: BMSDSBBG
In Stock
New Item
$ 229,229.00

This product was last offered at the strikethrough price on
01-21-2026

$ 229.00 USD
Free Shipping on orders $49 and up
$ 229.00 USD
Free Shipping on orders $49 and up
For G-Chassis BMW & A90/A91 Toyota Supra High torque loads, hard launches, and aggressive driving expose the factory differential mounting’s built-in compliance. Under power, the differential can shift excessively, resulting in wheel hop, inconsistent traction, and increased stress on drivetrain components—issues that become more pronounced on tuned or track-driven cars. The BMS Differential Support Bracket Brace corrects this weakness by reinforcing the differential mounting point and securely tying it to the subframe. By controlling unwanted movement, the brace improves rear-end stability and ensures power is transferred to the ground more efficiently. Why Upgrade? OEM differential mounts favor NVH reduction over control. As torque output increases, that compliance translates into drivetrain shock and lost traction. This brace stiffens the system where it matters most, reducing flex and improving load management under acceleration. Performance Benefits Improved launch consistency Significant reduction in wheel hop Increased rear-end stability under load More precise and predictable power delivery Engineered for Demanding Use Designed around factory mounting points, the BMS Differential Support Bracket delivers precise OE-level fitment with increased structural rigidity. Its robust construction resists deflection under high torque, while upgraded hardware provides greater clamping force for long-term reliability. Fully bolt-on for straightforward installation on both stock and modified vehicles. Key Features Reinforces rear differential mounting Limits differential movement under load Enhances traction and drivetrain response Heavy-duty construction for high-performance applications Bolt-on installation using factory locations Compatible with G-chassis BMW and A90/A91 Supra A focused drivetrain upgrade for drivers who demand consistency, control, and durability at higher performance levels.
Show More Show Less
Differential Input Shaft Seal - Priced Each
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
URO - Corporate Logo
T#:49335120
Part#: 33121213949
In Stock
New Item
$ 18.99 USD
Free Shipping on orders $49 and up
Replaces cracked or hardened valve body seals

Shaft Seal - Differential (Axle Drive)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Elring - Corporate Logo
T#:54852004
Part#: B46.610
In Stock
New Item
$ 14.99 USD
Free Shipping on orders $49 and up
This OEM-quality replacement shaft seal from Elring is the perfect fix for keeping your gear oil where it belongs.

Performance Polyurethane Rear Differential Bushings
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54317180
Part#: PFR5-324
Back Ordered
New Item
$ 51.99 USD
Free Shipping on orders $49 and up
PowerFlex Rear Diff Rear Mount Bushing - E36 - M42, M44, M50, M52, S5...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54281641
Part#: PFR5-326H
Ships in 1 Business Day
New Item
$ 139.99 USD
$ 139.99 USD
The Powerflex Heritage Collection replaces the soft factory unit with an engineered, high-performance polyurethane compound. It is designed to constrain differential rotation and stabilize the driveline without changing the classic aesthetic of the vehicle undercarriage.
Show More Show Less

PowerFlex Rear Diff Front Mount Bushing - E36 - M4, M44, M50, M52, S5...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54281644
Part#: PFR5-325H
Back Ordered
New Item
$ 44.99 USD
$ 44.99 USD
The Powerflex Heritage Series is a premium motorsport upgrade engineered to eliminate critical differential deflection. Molded from an advanced, proprietary polyurethane formula, this bushing stabilizes the differential nose under high-torque loading.
Show More Show Less
BMW 1502-2002 (1962 - 1977) Rear Diff Rear Mounting Bushing
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54352762
Part#: PFR5-2025H
Ships in 1 Business Day
New Item
$ 89.99 USD
$ 89.99 USD
By stabilizing the differential's position relative to the subframe, the rear diff bushing helps maintain static axle angles under extreme loads, reducing wear on peripheral drivetrain components and providing a highly predictable, repeatable platform for track setups.
Show More Show Less

BMW E21 Rear Diff Mounting Bushing
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54352781
Part#: PFR5-1625H
Ships in 1 Business Day
New Item
$ 89.99 USD
$ 89.99 USD

PowerFlex Rear Diff Front Mount Bushing - E36 M3 Evo - S50B32 ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54317182
Part#: PFR5-324H
Ships in 1 Business Day
New Item
$ 51.99 USD
$ 51.99 USD
Ensure your build operates at peak mechanical efficiency. Eliminate driveline slop and secure your differential assembly with track-proven engineering.
OEM Elring Rear Differential Axle Shaft Seal - BMW F3X G2X G8X & More...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Elring - Corporate Logo
T#:53008820
Part#: 33108860348
In Stock at Vendor
New Item
$ 44.99

This product was last offered at the strikethrough price on
05-08-2026

$ 43.99 USD
$ 43.99 USD
The Axle Shaft Seal is a critical component designed to prevent fluid leaks around the axle shaft, ensuring the proper function of the vehicle’s drivetrain system. This seal helps maintain the integrity of the differential, preventing dirt, water, or contaminants from entering the diff while keeping lubricants contained.
Show More Show Less
Vargas Rear Bushing Insert Kit - BMW G0X X3/X4, G11/12 7
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Vargas Turbo Technologies - Corporate Logo
T#:51778109
Part#: VTT-X3-REAR-INSE
Ships in 10 Business Days
New Item
$ 109.99 USD
Free Shipping
$ 109.99 USD
Free Shipping
The VTT G0X Rear Bushing Insert Kit is a critical preventative upgrade for owners of BMW G-Series vehicles.


Vargas Front Differential Bushing Reinforcement Insert Kit - Front - ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Vargas Turbo Technologies - Corporate Logo
T#:52129733
Part#: G8XDIFFINSFRT
Ships in 10 Business Days
New Item
$ 132.99 USD
Free Shipping
$ 132.99 USD
Free Shipping
The Vargas Turbo Technologies Front Diff Reinforcement Kit is a vital upgrade for high-horsepower S58-powered vehicles.
Vargas Billet Differential Lock Down Kit - Black - BMW G8X
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Vargas Turbo Technologies - Corporate Logo
T#:52129738
Part#: VTT-G8X-LOCKDOWN
Ships in 10 Business Days
New Item
$ 739.99 USD
Free Shipping
$ 739.99 USD
Free Shipping
This black-anodized kit provides the reinforcement BMW intended but never fully realized in the factory design.
Vargas Front Differential Bushing Reinforcement Insert Kit - Rear - B...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Vargas Turbo Technologies - Corporate Logo
T#:52129737
Part#: G8XDIFFINSTRO
Ships in 10 Business Days
New Item
$ 132.99 USD
Free Shipping
$ 132.99 USD
Free Shipping
The G8X Rear Billet Diff Insert Kit is a precision-machined reinforcement component that installs directly into the rear differential bushing.

Rogue Engineering E46 M3 Differential Bushing (Front Position) FIX ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Rogue Engineering - Corporate Logo
T#:54388516
Part#: RE.484.FIX
Ships in 8 Business Days
New Item
$ 64.00 USD
Free Shipping on orders $49 and up
A common failure point on the BMW E46 M3 platform occurs when the side differential mounting bolt backs out, leading to stripped threads in the differential cover.

Seal Set, Electric Motor
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Elring - Corporate Logo
T#:54852011
Part#: B16.900
In Stock
New Item
$ 33.99 USD
Free Shipping on orders $49 and up
This high-grade Elring replacement gasket set is engineered for drivers who demand factory-level reliability and zero-compromise sealing performance.
Output Shaft Seal
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
ZF - Corporate Logo
T#:54744784
Part#: 24207588763
Ships in 1-2 days
New Item
$ 2.99 USD
Free Shipping on orders $49 and up
If you notice a puddle of transmission fluid forming underneath your vehicle, the output shaft seal may have failed and is leaking. Stop the leak before it can cause internal transmission damage and replace the output shaft seal in your vehicle today. This seal is on the back of your transmission for the front to rear propeller or driveshaft.
Show More Show Less

BMW M Performance Limited-Slip Differential With Solid Delrin Mounts ...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:55353632
Part#: 33108659987KT2
Ships in 3 Business Days
New Item
$ 3,481.99 USD
$ 3,481.99 USD
Under hard acceleration, that stock rear diff twists, flexes, and deflects. Robbing your car of power
PowerFlex Rear Diff Rear Mounting Bushing - E10
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Powerflex - Corporate Logo
T#:54352763
Part#: PFR5-2025BLK
Back Ordered
New Item
$ 102.99 USD
$ 102.99 USD
The Powerflex Black Series is engineered for maximum performance and minimum deflection