Transmission mount 8W0399156BF combines durable high-strength rubber and metal construction for long-lasting performance, at a lower cost than OEM, with a bolt-on design for quick, easy DIY installation that saves time and labor.
Replacement NO.
8W0 399 156 AK
8W0 399 156 AL
Fit to
AUDI A6L
AUDI A4L
●Transmission mount 8W0399156BF is built with premium rubber and reinforced steel for superior durability and performance – lasts longer than stock!
●Easy Installation: Bolt - on design fits perfectly no modifications needed, saves time and money on repairs.
●NVH Reduction: Cuts noise, vibration, and harshness for a smoother, quieter ride – feel the difference!
Tools Needed:
Installing a transmission mount usually requires basic tools (like wrenches, screwdrivers, car jack, etc.).
Step - by - Step Guide:
1.Lift the Vehicle: Use a car jack to raise the vehicle to a safe working height.
2.Remove Old Mount: Uninstall the old transmission mount, keep all bolts and fasteners for reuse.
3.Inspect Transmission & Connections: Check the transmission and mounting points for damage or wear.
4.Install New Mount: Align the new Transmission mount 8W0399156BF with the mounting holes and secure it with bolts.
5.Torque to Spec: Tighten all bolts and screws firmly to prevent loosening.
6.Final Check: After installation, verify transmission stability and ensure no abnormal vibration or noise.
Important Notes:
●Keep mounting surfaces clean to avoid debris.
●Always follow your vehicle manual for correct torque specs and mounting position.
Maintenance guide
Regular Inspections
Regularly inspect the transmission mounts for signs of wear, such as cracks, looseness, or excessive movement.
Recommended Test: Have a trusted person sit in the driver’s seat, shift into Drive (D), firmly apply the brakes, then gently press the accelerator to make the engine “push against” the brakes. Observe from under the hood — if the engine shakes excessively, the mounts are fatigued.
(Inspired by real - world testing from Reddit car enthusiasts)
Timely Fluid Changes
Strictly follow the manufacturer’s recommended intervals to replace transmission fluid, preventing degradation that accelerates mount wear.
Common Question: “Do I need to replace the filter every time the transmission is flushed?”
✅ Yes, replace it every time — a clogged filter increases oil pressure stress, indirectly damaging the mounts.
Gentle Driving
Avoid hard acceleration, sudden braking, or frequent towing — smooth driving is the secret to long - lasting mounts.
Car owner’s rant: “I had the dealer fix a mount I thought was under warranty — turned out it wasn’t. Aggressive driving had already wrecked it.”
One - Sentence Summary:
Inspect + Change Fluid + Drive Gently = Replace mounts less often, save thousands!
When driving, certain issues can arise that affect your car’s performance, and one of the most common sources of these issues is a worn or damaged transmission mount. The transmission mount plays a crucial role in keeping the transmission in place, absorbing vibrations, and reducing noise. When this part begins to fail, various symptoms can develop. Below, we explore some of the common problems associated with a failing transmission mount and provide potential solutions.
Clunking Noises
One of the most frequent signs of a bad transmission mount is a clunking noise, especially when shifting gears. Many car owners report hearing this noise when moving from reverse to drive. The sound may also occur when changing gears at low speeds.
Solution: If you're experiencing clunking noises, it’s likely that the transmission mount has lost its ability to properly secure the transmission, causing it to shift or move during gear changes. Replacing the worn mount with a high - quality replacement mount should eliminate the noise.
Drivetrain Vibrations
Another common symptom of a failing transmission mount is drivetrain vibrations, particularly when the vehicle is idling in gear. You may notice that the car vibrates or shakes at low RPMs. Some owners have specifically mentioned experiencing drivetrain vibrations while idling in gear when their trans mount was sacked out.
Solution: Vibrations can indicate that the mount is no longer absorbing the vibrations as it should, leading to an unstable drivetrain. Replacing the mount with a more durable, performance - grade mount will reduce these vibrations and restore a smoother driving experience.
Rough Gear Shifts
Rough gear shifts can also be a sign of a failing transmission mount. This issue may be more noticeable when shifting at lower speeds, especially between first to second gears or second to third gears. Some owners have described their gear shifts as "a little rough," where the transition between gears feels jerky or delayed.
Solution: When the transmission mount wears out, it can cause the transmission to move slightly during gear shifts, making the process feel less smooth. Replacing the mount should improve the shift quality and reduce any roughness when changing gears.
Car Bogging
Car bogging is another common issue associated with a worn transmission mount. This typically happens when you release the accelerator at lower speeds. When the mount is worn out, the transmission may not stay in the correct position, leading to the engine feeling sluggish or bogging down when you ease off the gas.
Solution: To fix this issue, you’ll need to replace the failing transmission mount. A new mount will help keep the transmission in place, preventing bogging and improving throttle response, especially at lower speeds.
Drivetrain Slack
If you feel an increase in drivetrain slack, it can make your car feel less responsive, and driving smoothly may become more difficult. Many owners have noted issues with drivetrain slack and clearance problems caused by the flex in the stock transmission mount. They reported "banging" sounds and difficulty maintaining smooth driving due to the excessive movement.
Solution: If the stock mount is causing too much flex and drivetrain slack, upgrading to a performance transmission mount can resolve these issues. A stiffer mount will reduce excessive movement, improve throttle response, and make the car feel more responsive when driving.
Conclusion
A failing transmission mount can lead to a variety of driving issues, such as clunking noises, vibrations, rough gear shifts, car bogging, and drivetrain slack. If you're experiencing any of these symptoms, it’s important to address the problem promptly by replacing the faulty mount. Opt for high - quality replacement mounts to restore your car’s performance and ensure a smoother, more enjoyable driving experience.
Welcome to purchase the VDI Transmission Mount 8W0399156BF.
●We have a stable and reliable production supply chain, ensuring that every order is delivered on time. Even with large bulk orders of Transmission Mount 8W0399156BF, we guarantee on-time delivery, avoiding any delays in shipments.
●Advance Planning and Order Tracking: We support advance planning and regular restocking to ensure that your inventory remains well - stocked. Additionally, we offer logistics tracking services so you can stay updated on the status of your orders throughout the shipping process.
●Variety of Shipping Options: Depending on your needs, we provide a range of shipping methods (air freight, sea freight, land transport, etc.) to ensure timely deliveries while also controlling costs effectively.
