1967-1972 Buick Estate Wagon Automatic Transmission Mount Replacement Guide
Stop the clunking and shaking in your classic Estate Wagon by understanding and replacing your transmission mount.
- A clunk when shifting into gear is the #1 symptom of a bad mount.
- Aftermarket brands like Anchor and DEA are economy options; they work, but don't expect the longevity of an original part.
- Replacement is a simple DIY job for this vehicle, requiring basic tools and safely supporting the transmission.
- Always inspect engine mounts at the same time, as they wear out together and a bad one will stress the new transmission mount.
Is Your Transmission Mount Failing? Common Symptoms
A transmission mount wears out over time. The rubber inside it can dry rot, crack, or become saturated with leaking oil or transmission fluid. When it fails, you'll likely notice one or more of these signs:
- 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 acceleration or sudden stops as the transmission shifts and hits the frame.
- Excessive Vibration: You may feel a new or increased vibration in the floor or seats, especially when the car is in gear and under load. A good mount isolates these vibrations, so feeling them means the rubber has likely failed.
- Drivetrain Movement: A mechanic can often see the engine and transmission move excessively when shifting gears or revving the engine. This movement can put stress on other parts like the driveshaft, U-joints, and exhaust system.
Choosing the Right Aftermarket Mount
For a 1967-1972 Buick Estate Wagon, original GM-branded mounts are no longer produced. Your primary options are new aftermarket parts from brands like Anchor or DEA. It is important to be realistic about what you are buying.
Aftermarket Brand Quality Tiers
| Brand | Tier | Our Price Range | Notes |
|---|---|---|---|
| Anchor, DEA | Economy | $10.99 - $14.62 | These are budget-friendly, standard replacement parts. Forum discussions show mixed experiences; some owners find them perfectly adequate for a classic car that isn't a daily driver, while others report shorter lifespans compared to original parts. For the price, they get the job done, but don't expect original OEM quality or longevity. |
| Rebuilt OEM | Premium | $150+ | For owners seeking the highest quality and originality, specialty restoration companies can rebuild your original mount with new, high-quality rubber. This is a more expensive option but provides durability that often exceeds new economy parts. |
Pro Tip: When one mount fails, it puts extra stress on the others. Always inspect your engine mounts when replacing the transmission mount. If they are original or look worn, it's wise to replace them at the same time to ensure proper drivetrain alignment and prevent future problems.
Known Issues, Recalls, or Service Bulletins
There are no active recalls or vehicle-specific Technical Service Bulletins (TSBs) from the National Highway Traffic Safety Administration (NHTSA) for the automatic transmission mount on the 1967-1972 Buick Estate Wagon. Any issues you experience are likely due to the age and normal wear-and-tear of the component.
Frequently Asked Questions (FAQ)
Can I drive with a bad transmission mount?
It is not recommended for long distances. While the transmission is unlikely to fall out, the excessive movement can cause damage to driveshaft components, U-joints, exhaust pipes, and wiring. It's best to get it replaced soon after symptoms appear.
How hard is it to replace the transmission mount myself?
For a classic rear-wheel-drive car like the Estate Wagon, this is a relatively easy job for a DIY mechanic. It typically involves supporting the transmission with a floor jack and a block of wood, removing a few bolts, and swapping the part. You will need basic hand tools, a jack, and jack stands for safety.
Can a bad transmission mount feel like a bad transmission?
Yes. The harsh clunking when shifting into gear can be mistaken for an internal transmission problem. If you experience these noises, checking the mount first is a simple and inexpensive diagnostic step before assuming a costly transmission repair is needed.
Should I use a polyurethane (poly) mount?
For a stock Estate Wagon, a standard rubber mount is best. Polyurethane mounts are much stiffer and will transfer significantly more vibration into the cabin, reducing ride comfort. They are typically used in performance applications and are not recommended if you want to maintain the original smooth ride of your Buick.
Technical Specifications
OEM Part Numbers: 3633035
This is a single, rear-wheel-drive style transmission mount that bolts to the transmission tailshaft housing and the frame crossmember. It consists of a metal bracket with a bonded rubber block to absorb vibration.
We Have This Part in Stock
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.