Toyota Avalon Automatic Transmission Mount: A Guide for 2008-2022 Models
If you feel a clunk or vibration when you shift your Avalon, your transmission mount might be the problem.
- A clunking noise when shifting and new vibrations are the most common signs of a bad mount on an Avalon.
- There are no major recalls or TSBs for this specific part; failure is usually due to normal wear.
- Aftermarket brands like Anchor, DEA, and Westar are affordable but may not last as long or fit as perfectly as OEM parts.
- Replacing a bad mount is important to prevent extra stress on other drivetrain components like axles and other mounts.
Signs of a Failing Transmission Mount in Your Avalon
A transmission mount doesn't usually fail suddenly. It wears out over time. The rubber gets old, cracks, or gets soaked with oil, and it stops doing its job. When this happens, you'll start to notice some clear signs.
Key Failure Symptoms
- Clunking or Banging Noises: The most common symptom is a loud clunk or bang when you shift from Park into Drive or Reverse. You might also hear it during hard acceleration or braking as the transmission shifts around.
- Excessive Vibrations: You may feel a new vibration through the floor, seats, or steering wheel. This shaking is often worse when the car is in gear and stopped, or during acceleration.
- Engine and Transmission Movement: A bad mount allows the whole engine and transmission assembly to move too much. A mechanic can check this by watching the engine while shifting gears with the brakes applied.
Choosing the Right Aftermarket Mount
When replacing your Avalon's transmission mount, you have a choice between original Toyota parts (OEM) and aftermarket brands. OEM mounts are what your car was built with and generally offer the best fit and longest life, but they are also the most expensive. Aftermarket parts can save you a lot of money, but the quality can vary.
For the 2008-2022 Avalon, several aftermarket brands are available:
- Value-Priced Brands (Anchor, DEA, Westar): These brands are widely available and very affordable. They are a practical choice for budget-conscious repairs. However, some mechanics and car owners report that these mounts can be made with harder rubber, which might transmit more vibration into the car. There are also occasional reports of them not fitting perfectly or wearing out faster than OEM parts.
- Mid-Tier Brands (Pioneer): Some forum users have had better experiences with brands like Pioneer, noting their quality and appearance can be closer to the original factory mounts. If you're looking for a balance between cost and quality, this tier can be a good option.
Pro Tip: For a daily driver you plan to keep for many more years, spending extra on an OEM mount or a higher-quality aftermarket part can be a good investment to avoid doing the job twice. If the car has very high mileage or you're planning to sell it soon, a value-priced brand can be a cost-effective solution.
Known Issues, Recalls, and Service Bulletins
Searches of the National Highway Traffic Safety Administration (NHTSA) database show no specific recalls for the automatic transmission mount on the 2008-2022 Toyota Avalon. While there have been recalls for this vehicle range, they involve other components like airbags, fuel pumps, or steering parts. Similarly, there are no widespread Technical Service Bulletins (TSBs) pointing to a common defect with the transmission mount itself. Failure of this part is typically due to age, mileage, and normal wear and tear.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $72.21 - $95.67 |
| New OEM (Dealer) Part | $150 - $250 |
| Shop Labor | $150 - $300 |
| Total Professional Replacement | $220 - $400 (Aftermarket) / $300 - $550 (OEM) |
Frequently Asked Questions
Is it hard to replace an Avalon transmission mount myself?
For a DIYer with the right tools, it is a manageable job. It requires safely lifting the car, supporting the transmission with a jack, and accessing bolts in a tight space. You will need a good socket set, a floor jack, and jack stands. The difficulty is moderate, as you need to be comfortable working under the vehicle.
How long does a transmission mount last?
Original factory mounts can last over 100,000 miles. Their lifespan can be shortened by oil leaks, rough road conditions, or aggressive driving habits. Aftermarket mount longevity can vary by brand and quality.
Can a bad transmission mount damage other parts?
Yes. If left unfixed, the excessive movement can put stress on other engine mounts, CV axles, exhaust pipes, and transmission seals, potentially leading to more expensive repairs down the road.
Will a new mount make my car feel different?
Absolutely. A new transmission mount will stop the clunking noises and reduce vibrations, making your Avalon feel smoother and quieter, especially when shifting and accelerating.
Technical Specifications
OEM Part Numbers: 12372-0P010 12372-0P030 12372-0A040 12372-20080
The automatic transmission mount for the 2008-2022 Toyota Avalon is typically located on the driver's side of the engine bay, connecting the transmission housing to the vehicle's subframe. It consists of a metal bracket and a rubber or hydraulic-filled insulator to dampen vibration.
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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.
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