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ECS Drivetrain Mounts and Upgrades

From the factory, engine and transmission mounts are rubber and thus a wear component. Worn out engine or transmission mounts create sloppiness and a disconnect between the driver and your BMW's powerplant. If your vehicle is purpose built for the track, we recommend solid engine and transmission mounts. These have zero deflection, but come at the expense of added NVH (noise, vibration, and harshness). Poly engine and transmission mounts offer a good balance between OEM rubber and solid mounts for those with mixed purpose vehicles, offering great performance and connection with little sacrifice in terms of NVH.

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Performance Polyurethane Differential Bushing Set - E9X M3
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:596679
Part#: 026711ECS09
In Stock
Sale - Save 5% $ 177.99

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

$ 169.09 USD
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Sale - Save 5%
$ 177.99

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

$ 169.09 USD
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Upgrade your worn rubber bushings with ECS Tuning's Performance Polyurethane Differential Bushing Set. In-House Engineered to improve power delivery and handling, with a superior service life over the soft factory rubber bushings.
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Street/Track Polyurethane Transmission Mount Set
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:377537
Part#: 002705ECS01
Ships on Nov 13, 2026
Sale - Save 15% $ 115.99

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

$ 98.59 USD
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Sale - Save 15%
$ 115.99

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

$ 98.59 USD
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Enhance your car's performance with ECS Tuning's polyurethane transmission mounts, designed for both street and track applications. These mounts are engineered to withstand high torque and forced-induction scenarios, eliminating concerns about torn mounts and providing a more engaging driving experience. Although polyurethane may introduce some additional NVH (Noise, Vibration, Harshness), its exceptional durability, wear resistance, and resistance to water, oil, and grease make it the perfect choice for performance enthusiasts. ECS Tuning offers two durometer options to match your driving style, along with a comprehensive DIY installation guide, ensuring a complete solution for your transmission mount requirements.

Key Features:

  • Minimized transmission movement, reducing the risk of mis-shifts and over-revs.
  • Made from high-quality polyurethane bonded with 304 Stainless Steel.
  • Enhanced driving experience for both street and track enthusiasts.
  • Two durometer options available: 80A for race applications and 70A for daily driving (ES#2859359).
  • Replaces weak OEM mounts.
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ECS - Corporate Logo
T#:378193
Part#: 002447ECS03KT
In Stock
Sale - Save 25% $ 197.99

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

$ 148.49 USD
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Sale - Save 25%
$ 197.99

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

$ 148.49 USD
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Worn rubber differential mounts will lead to the differential twisting and shifting around in the rear subframe. Not only will this be noisy but it's bad for driver confidence and bad for the chassis as well. Even on fresh rubber bushings the differential has deflection and twist, especially if the car has been modified for more torque. Since the differential is centrally mounted in the rear subframe, with all suspension mounts interconnected, a differential with too much deflection will affect handling and could even damage the rear subframe.

These 88A urethane E46 M3 diff mounts are much stiffer than stock but still not as solid as our Turner aluminum/Delrin bushings. This set will resist twisting much better than the stock rubber mounts. Included is the front diff mount and two rear mounts in the cover.

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ECS - Corporate Logo
T#:589555
Part#: 026709ECS09
In Stock
Sale - Save 15% $ 183.99

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

$ 156.39 USD
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Sale - Save 15%
$ 183.99

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

$ 156.39 USD
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Upgrade your worn OE rubber bushings with ECS Tuning's Performance Polyurethane Differential Bushing Set. In-House Engineered to improve power delivery and handling, with a superior service life over the soft factory rubber bushings.
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ECS Heavy Duty Differential Bushing - E30, 318ti, Z3
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:30662812
Part#: 055059LA01
In Stock
Sale - Save 57% $ 52.99

This product was last offered at the strikethrough price on
04-28-2026

$ 22.99 USD
Free Shipping on orders $49 and up
Sale - Save 57%
$ 52.99

This product was last offered at the strikethrough price on
04-28-2026

$ 22.99 USD
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As your E30 ages, the rear differential bushing can crack, dry rot, and split. It's time for an upgrade. The ECS Tuning Heavy Duty Differential Bushing is crafted with performance in mind. Instead of using polyurethane, which is known for increasing NVH, the enthusiasts at ECS chose HD 70D rubber. This material offers a close-to-factory feel without the excess deflection of softer bushings, ensuring a pleasurable driving experience free from differential whine and excess movement.

Features & Benefits:

Eliminates Weak OEM Mount: The aging E30 chassis deserves an upgrade. Replace your old, cracked, and worn factory bushing with this HD alternative for improved performance. Perfect for Street or Track: Constructed from HD rubber instead of polyurethane or Delrin, this bushing provides comfort for daily driving while remaining effective in performance applications. Added Responsiveness: The 70D HD rubber compound is stiffer than the stock material, reducing drivetrain movement and effectively locking down your rear differential. Easy Installation: Precision-manufactured to the exact specifications of your OEM differential bushing, the ECS heavy-duty replacement installs just like the factory component. Whether you are replacing an aging factory bushing, removing excess driveline movement, or balancing performance and comfort, ECS Tuning has you covered with their Heavy Duty Rear Differential Bushing.

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ECS - Corporate Logo
T#:378192
Part#: 002447ECS02KT
In Stock
Sale - Save 25% $ 183.99

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

$ 137.99 USD
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Sale - Save 25%
$ 183.99

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

$ 137.99 USD
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Worn rubber differential mounts will lead to the differential twisting and shifting around in the rear subframe. Not only will this be noisy but it's bad for driver confidence and bad for the chassis as well. Even on fresh rubber bushings the differential has deflection and twist, especially if the car has been modified for more torque. Since the differential is centrally mounted in the rear subframe, with all suspension mounts interconnected, a differential with too much deflection will affect handling and could even damage the rear subframe.

These 88A urethane E46 diff mounts are much stiffer than stock but still not as solid as our Turner aluminum/Delrin bushings. This set will resist twisting much better than the stock rubber mounts. Included are the two front diff mounts and the rear mount in the cover.

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ECS - Corporate Logo
T#:638460
Part#: 026809ECS10KT
Ships on Nov 9, 2026
Sale - Save 3% $ 182.99

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

$ 177.50 USD
Free Shipping
Sale - Save 3%
$ 182.99

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

$ 177.50 USD
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Differential bushings are responsible for keeping your rear end planted during the delivery of power to the rear wheels. As these bushings age, they wear out and should be replaced. If you ever see your bushings are cracked, it is time to replace them. By eliminating the drivetrain deflection that factory rubber bushings permit, throttle response is improved, and the tendency for a car to “Wheel Hop” is significantly reduced. Upgrade to ECS Poly Diff Bushings and feel the difference!
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ECS - Corporate Logo
T#:589549
Part#: 26696ECS09
In Stock
Sale - Save 25% $ 437.99

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

$ 328.49 USD
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Sale - Save 25%
$ 437.99

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

$ 328.49 USD
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Differential bushings are responsible for keeping your rear end planted during the delivery of power to the rear wheels. As these bushings age, they wear out and should be replaced. If you ever see your bushings are cracked, it is time to replace them. By eliminating the drivetrain deflection that factory rubber bushings permit, throttle response is improved, and the tendency for a car to “Wheel Hop” is significantly reduced. Upgrade to ECS Poly Diff Bushings and feel the difference!
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ECS - Corporate Logo
T#:363116
Part#: 002447ECS02
In Stock
Sale - Save 25% $ 66.99

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

$ 50.24 USD
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Sale - Save 25%
$ 66.99

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

$ 50.24 USD
Free Shipping on orders $49 and up

Enhance your driving experience with ECS Tuning's Performance Polyurethane Differential Bushings. These meticulously engineered bushings offer a direct connection between your right foot, the engine, and the chassis, making them an essential upgrade.

  • Say goodbye to the softness of factory rubber differential bushings that absorb vibrations and reduce performance.
  • ECS Tuning's polyurethane bushings eliminate the deflection found in factory rubber bushings, resulting in improved power transfer from the differential to the wheels.
  • Experience enhanced throttle control, whether you're navigating a challenging canyon road, drag racing, or simply commuting.

Unlike delrin or solid differential mounts, these bushings deliver improved performance without introducing harshness or excessive vibration.

Crafted from durable 88A durometer polyurethane and enhanced with a black anodized 6061-T6 aluminum sleeve.

Resistant to chemicals, ozone degradation, road salt, and general wear and tear, ensuring a longer service life.

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Performance Polyurethane Differential Bushing Set - E36
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:341288
Part#: 002447ECS01KT
In Stock
Sale - Save 25% $ 203.99

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

$ 152.99 USD
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Sale - Save 25%
$ 203.99

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

$ 152.99 USD
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Urethane mounts keep the differential from twisting under load. As torque is put through the driveline it causes anything to twist and move. The differential is mounted to the subframe and the twisting and deflection can be transferred to the rest of the chassis. With a stiffer mount the differential will not deflect as much. This improves seat-of-the-pants feeling to the driver, giving more feedback for smoother power delivery. In theory, there's also more torque being sent to the drive wheels since it's not being used up shifting the diff weight around.

These are tough 88A durometer urethane bushings with a anodized almunum center sleeve, engineered by ECS. This is a set of E36 diff bushings - 1 for the front and 2 for the rear cover. New high-grade hardware is included (the front bolt has a tendency to snap from all that torque twisting!).

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ECS - Corporate Logo
T#:384599
Part#: 002447ECS04KT2
In Stock
Sale - Save 25% $ 66.47

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

$ 49.85 USD
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Sale - Save 25%
$ 66.47

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

$ 49.85 USD
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Your E36's rear differential is indirectly connected to your right foot through the engine and driveline, and connected to the seat of your pants through the chassis. Soft factory rubber differential bushings absorb vibrations between chassis and differential, providing comfort and softness in both of these connections. ECS Tuning's In-House Engineered Performance Polyurethane Differential Bushing eliminate deflection permitted by factory bushings, improving the connection you feel to your differential. Removal of this slop allows for crisper power transfer from differential to wheels, which means better throttle control while carving a canyon road, drag racing, sliding the rear end out, or just driving to work. This is achieved without the harshness or vibration associated with delrin or solid differential mounts. Featuring a tough 88A durometer polyurethane and Black anodized 6061-T6 aluminum Sleeve, our Performance Polyurethane Differential Bushings are more resistant to chemicals, ozone degradation, road salt, and general wear and tear than factory rubber bushings, resulting in a longer service life.
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ECS - Corporate Logo
T#:656153
Part#: 026696ECS10
In Stock
Sale - Save 20% $ 235.99

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

$ 188.79 USD
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Sale - Save 20%
$ 235.99

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

$ 188.79 USD
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Differential bushings are responsible for keeping your rear end planted during the delivery of power to the rear wheels. As these bushings age, they wear out and should be replaced. If you ever see your bushings are cracked, it is time to replace them. By eliminating the drivetrain deflection that factory rubber bushings permit, throttle response is improved, and the tendency for a car to “Wheel Hop” is significantly reduced. Upgrade to ECS Poly Diff Bushings and feel the difference!
Show More Show Less


ECS - Corporate Logo
T#:638439
Part#: 026809ECS09KT
In Stock
Sale - Save 3% $ 172.99

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

$ 167.80 USD
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Sale - Save 3%
$ 172.99

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

$ 167.80 USD
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Differential bushings are responsible for keeping your rear end planted during the delivery of power to the rear wheels. As these bushings age, they wear out and should be replaced. If you ever see your bushings are cracked, it is time to replace them. By eliminating the drivetrain deflection that factory rubber bushings permit, throttle response is improved, and the tendency for a car to “Wheel Hop” is significantly reduced. Upgrade to ECS Poly Diff Bushings and feel the difference!
Show More Show Less
ECS - Corporate Logo
T#:378219
Part#: 002447ECS04KT
In Stock
Sale - Save 25% $ 112.99

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

$ 84.74 USD
Free Shipping
Sale - Save 25%
$ 112.99

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

$ 84.74 USD
Free Shipping

Your rear differential is indirectly connected to your right foot through the engine and driveline, and connected to the seat of your pants through the chassis. Soft factory rubber differential bushings absorb vibrations between chassis and differential, providing comfort and softness in both of these connections.

Enter ECS Tuning's In-House Engineered Performance Polyurethane Differential Bushings. By eliminating the deflection factory rubber bushings permit, the connection between your right foot (and your seat) to the wheels is improved. Removal of this slop allows for crisper power transfer from differential to wheels, which means better throttle control while carving a canyon road, drag racing, sliding the rear end out, or just driving to work. This is achieved without the harshness or vibration associated with delrin or solid differential mounts.

Featuring a tough 88A durometer polyurethane and Black anodized 6061-T6 aluminum Sleeve, our Performance Polyurethane Differential Bushings are more resistant to chemicals, ozone degradation, road salt, and general wear and tear than factory rubber bushings, resulting in a longer service life.

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ECS - Corporate Logo
T#:384597
Part#: 002447ECS01KT1
In Stock
Sale - Save 25% $ 148.99

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

$ 111.74 USD
Free Shipping
Sale - Save 25%
$ 148.99

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

$ 111.74 USD
Free Shipping
Your E36's rear differential is indirectly connected to your right foot through the engine and driveline, and connected to the seat of your pants through the chassis. Soft factory rubber differential bushings absorb vibrations between chassis and differential, providing comfort and softness in both of these connections. ECS Tuning's In-House Engineered Performance Polyurethane Differential Bushing eliminate deflection permitted by factory bushings, improving the connection you feel to your differential. Removal of this slop allows for crisper power transfer from differential to wheels, which means better throttle control while carving a canyon road, drag racing, sliding the rear end out, or just driving to work. This is achieved without the harshness or vibration associated with delrin or solid differential mounts. Featuring a tough 88A durometer polyurethane and Black anodized 6061-T6 aluminum Sleeve, our Performance Polyurethane Differential Bushings are more resistant to chemicals, ozone degradation, road salt, and general wear and tear than factory rubber bushings, resulting in a longer service life.
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