Differential Mounts & Bushings for Audi, BMW, Toyota & Ford

Differential Mounts and Inserts

Differential mounts secure the housing to the chassis or subframe. Firmer replacement mounts and billet inserts can limit movement under acceleration, braking and cornering.

Balance response and comfort

A firmer mount can improve driveline control but may add noise and vibration. Choose material and stiffness around street, track or off road use.

Billet Rear Differential Inserts

Billet inserts for Audi and BMW applications fill movement in the factory mount arrangement. They are often chosen for performance driving where controlled driveline motion is important.

Confirm chassis code

Audi B6, B7, B8, B9 and BMW F chassis components can differ. Verify the exact vehicle and rear differential configuration.

Differential Drop Kits

A differential drop kit can correct front axle angles after a suspension lift on trucks and SUVs. Brackets and spacers must match the lift height and vehicle configuration.

Lift height matters

Use a kit designed for the actual suspension height. An incorrect drop can create clearance or driveline geometry problems.

Carrier Bearing Drop Hardware

Carrier bearing drop kits adjust driveshaft support position on lifted trucks. This can help manage driveline angle after lift modifications.

Inspect the driveline

Check U joints, carrier bearing condition and driveshaft angles when installing lift related differential hardware.

Axle U Bolts and Hardware

New axle U bolts are often required after lift blocks, spring changes or axle service. They must match axle tube diameter, spring pack width and thread length.

Use new U bolts when specified

U bolts stretch when torqued and should be replaced when the suspension manufacturer or service procedure requires it.

Toyota and Ford Truck Applications

Toyota Tundra, Tacoma and Ford F series trucks can use differential drop or axle hardware during lift installation. Cab, drivetrain and model year affect selection.

Four wheel drive fitment

Verify whether the truck is two wheel drive or four wheel drive and confirm the front suspension type before selecting a drop kit.

Jeep and Off Road Driveline Support

Jeep Cherokee and CJ applications may use axle and suspension hardware during a lift or restoration. Check axle type and leaf spring dimensions.

Plan the full suspension system

Lifted vehicles may also need shocks, steering, brake line and driveline changes. Build the system around the vehicle use.

Installation and Inspection

Driveline hardware is safety critical. Support the vehicle correctly, follow torque values and inspect fasteners after the first drive and after trail use.

Watch for vibration

New vibration after installation can indicate an angle, mounting or fastener issue. Stop and inspect before further driving.

Top Differential Mounts Brands

• Torque Solution. Billet differential mount inserts for Audi and BMW performance applications.
• Tuff Country. Differential drop brackets, axle U bolts and truck lift hardware.
• SuperPro. Suspension and driveline bushings for on road and off road vehicles.
• Whiteline. Performance bushings and driveline support components.
• Energy Suspension. Polyurethane bushing solutions for vehicle chassis systems.
• Powerflex. Performance polyurethane bushing upgrades.
• Skyjacker. Truck suspension and lift support hardware.
• Fabtech. Lift and truck drivetrain related components.
• Teraflex. Jeep driveline and suspension products.
• ARB. Off road hardware for expedition builds.

How to Choose the Correct differential mount

• Confirm the exact year, make, model and drivetrain.
• Identify the differential location and mounting style.
• Check chassis code for Audi and BMW applications.
• Choose rubber, polyurethane or billet support around NVH goals.
• Measure lift height before selecting a differential drop.
• Confirm front or rear axle and suspension layout.
• Match axle U bolt width, diameter and thread length.
• Inspect carrier bearing and driveshaft condition during lift work.
• Use new critical hardware when specified.
• Re torque suspension and driveline fasteners after initial driving.

Common Questions

What does a differential mount do?

A differential mount secures the differential housing and controls movement under acceleration, braking and cornering.

Will a firmer differential mount add vibration?

It can. Firmer polyurethane or billet designs may transmit more noise and vibration than soft factory rubber mounts.

What is a differential drop kit for?

A differential drop kit adjusts front differential position after a suspension lift to help manage axle and driveline angles.

Do I need a diff drop with every lift?

No. Need depends on the vehicle, lift height and suspension design. Use the lift manufacturer guidance for the exact application.

What is a carrier bearing drop kit?

It repositions the driveshaft support bearing on applicable trucks to help correct driveline geometry after a lift.

Can Audi differential inserts fit every S4?

No. Audi chassis generations and differential mount designs vary. Confirm the specific chassis code and model year.

Should I replace axle U bolts after suspension work?

Replace them when the vehicle or suspension manufacturer specifies new U bolts. They are critical fasteners and can stretch during torqueing.

How do I choose axle U bolt size?

Match axle tube diameter, spring pack width, thread length and the exact axle or lift configuration.

Can a bad differential mount cause clunks?

Yes. Excess movement in a worn mount can contribute to clunks, wheel hop and inconsistent driveline response.

When should I inspect differential hardware?

Inspect during routine maintenance, after lift installation, after the first drive and after off road use.

Why Buy Differential Mounts from Black Ops Auto Works

Black Ops Auto Works stocks 38 differential mount and drivetrain support SKUs for Audi, BMW, Toyota, Ford and Jeep builds with real fitment data, competitive pricing and knowledgeable support. Products are filterable by year, make, model, trim, engine and drivetrain to confirm the correct application before ordering.

For focused shopping, browse our Differentials, Differential Install Kits, Differential Yokes, Differential Seal Kits, Axles and Bushings.