Acura TL Automatic Transmission Mount Guide (1999-2007)
Eliminate clunks and vibrations by understanding the automatic transmission mounts in your 1999-2007 Acura TL.
- Symptoms of a bad transmission mount include clunking noises when shifting, excessive vibration at idle, and rough gear changes.
- The 1999-2007 Acura TL has multiple engine and transmission mounts; when one fails, the others are likely worn and should be inspected.
- For the smoothest ride, OEM or premium aftermarket mounts (like Beck Arnley) are recommended over budget brands, which may increase cabin vibration.
- Replacing the upper transmission mount is a feasible DIY job, but other mounts can be very difficult and may require professional help.
Is Your Acura TL Vibrating or Clunking?
A failed automatic transmission mount is a common problem as the Acura TL ages. The rubber in the mount can crack, tear, or collapse from constant heat and stress. When a mount fails, it can no longer hold the transmission securely or absorb vibrations. This leads to several distinct symptoms that can make your car feel rough and noisy.
🎬 Watch this video to identify common bad transmission mount symptoms.Key Symptoms of a Bad Transmission Mount:
- Vibrations: This is the most common sign. You may feel a strong vibration in the seats, floor, or steering wheel, especially when the car is stopped but in gear (like at a stoplight).
- Clunking Noises: A loud "clunk" or "thud" when you shift from Park to Drive or Reverse is a classic symptom. You might also hear this noise when you accelerate or brake suddenly.
- Rough Shifting: Gear changes may feel harsher or more abrupt than usual.
- Excessive Engine Movement: A broken mount allows the entire engine and transmission assembly to move or jump excessively when shifting gears or revving the engine.
Generation-Specific Concerns
The 1999-2003 (2nd Gen) Acura TL was known for significant automatic transmission issues. While mounts are a separate component, a failing transmission can put extra stress on them. For 2004-2007 (3rd Gen) models, engine and transmission mounts are a very common wear item, with the front and side mounts being particularly prone to failure from heat and leaking hydraulic fluid.
Choosing the Right Aftermarket Mount
When replacing a transmission mount, you have a choice between OEM (Original Equipment Manufacturer) and various aftermarket brands. For a component that controls vibration, the quality of the rubber makes a huge difference.
- Premium Aftermarket (e.g., Beck Arnley): Brands like Beck Arnley often aim to match OEM specifications and are a good choice for owners wanting a balance of quality and price. They are generally considered a step up from budget brands.
- Standard/Economy Aftermarket (e.g., Anchor, DEA, Westar): These brands offer a significant cost saving. However, owner experiences are mixed. Some report that these mounts use harder rubber, which can lead to a noticeable increase in cabin vibration compared to the original parts. While they will fix clunking from a completely broken mount, they may not restore the original smooth feel of the car.
Pro Tip: Many experienced Acura owners recommend using OEM or premium aftermarket mounts, especially for the hydraulic engine mounts found on these models, to avoid issues with vibration. If one mount has failed, it's a good idea to inspect all engine and transmission mounts, as the others are likely worn and will fail soon.
🎬 Learn the do's and don'ts of replacing Acura TL mounts.Cost to Replace an Acura TL Transmission Mount
| Item | Estimated Cost |
|---|---|
| New Aftermarket Mount | $10.21 - $75.69 (per mount) |
| New OEM Mount | $130 - $290+ (per mount) |
| Shop Labor | $100 - $250 (per mount, depending on location) |
Frequently Asked Questions (FAQ)
How many transmission mounts does my 1999-2007 Acura TL have?
Automatic transmission models typically have two or three transmission mounts, which work with three engine mounts for a total of five or six mounts supporting the powertrain. The exact number can vary between the 2nd Gen (1999-2003) and 3rd Gen (2004-2007) models.
Can I replace just one broken mount?
Yes, you can replace only the mount that has failed. However, when one mount fails due to age, it puts extra stress on the remaining mounts, accelerating their wear. It's common for the others to fail soon after, so it is often recommended to replace them as a set or at least inspect them all carefully.
Will an aftermarket mount make my car vibrate more?
It can, yes. Cheaper, economy-level aftermarket mounts may use a harder rubber compound that doesn't absorb vibrations as well as the OEM design. This can result in more noticeable noise and vibration in the cabin, especially at idle.
Is replacing a transmission mount a DIY job?
It depends on the mount's location. The upper transmission mount, located under the battery and air intake box, is generally accessible for a DIYer with basic tools. The lower and rear mounts can be much more difficult, sometimes requiring the subframe to be lowered for access. You will always need a floor jack and a block of wood to safely support the transmission during the replacement.
🎬 See how to replace automatic mounts on an Acura TL.Helpful Videos
Technical Specifications
OEM Part Numbers: 50870-SDB-A02 50850-SDB-A00 50860-SDB-A00 50810-SDA-A02 50805-S3M-A02 50806-S3M-A02
The Acura TL uses a combination of solid rubber and hydraulic, vacuum-assisted mounts to secure the engine and transmission. The system consists of 5-6 mounts in total, depending on the transmission type. Key replacement tools include 10mm, 14mm, and 17mm sockets, a floor jack, and a block of wood.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Acura TL: