A Mechanic's Guide to the 1991-1996 Buick Roadmaster Transmission Mount
Experiencing clunks or vibrations in your Roadmaster? Your transmission mount might be the culprit.
- A clunking noise when shifting into gear is the #1 sign of a bad transmission mount on a Roadmaster.
- For a good balance of quality and price, the Pioneer brand is a well-regarded aftermarket option.
- Avoid budget brands like Anchor and DEA, as many owners report they fail quickly.
- Replacement is a straightforward DIY job for those with a floor jack and basic hand tools.
Is Your Roadmaster's Transmission Mount Failing?
The transmission mount is a simple part, but when it fails, the symptoms are hard to ignore. Because the Roadmaster is a heavy, rear-wheel-drive car with a V8, a worn mount will cause noticeable issues. The rubber in the mount can crack, collapse, or get soaked with oil, leading to failure.
Common Symptoms of a Bad Mount:
- Clunking Noises: The most common sign is a loud "clunk" or "bang" when you shift from Park into Reverse or Drive. You might also hear this noise during hard acceleration or braking. This is the sound of the transmission moving excessively and hitting the frame.
- Excessive Vibrations: If you feel new or worsening vibrations through the floor or seat, especially while idling in gear, the mount's rubber is likely no longer absorbing the drivetrain's vibrations.
- Drivetrain Movement: In severe cases, you might feel the whole drivetrain shift or jerk when you accelerate or let off the gas. A mechanic can confirm this by watching the engine and transmission for excessive rocking while shifting gears with the brakes applied.
Can I Keep Driving with a Bad Transmission Mount?
You can drive for a short time, but it's not recommended. A completely failed mount can put extra stress on your engine mounts, driveshaft, and transmission seals, leading to more expensive repairs down the road. It's best to get it replaced soon after noticing symptoms.
Choosing the Right Aftermarket Mount
For a vehicle like the 1991-1996 Roadmaster, you don't necessarily need to buy an expensive OEM part from a dealer. However, not all aftermarket brands are created equal. Forum discussions among car owners show a clear difference in quality.
| Brand Tier | Brands | Quality & Value Assessment |
|---|---|---|
| Good Quality Aftermarket | Pioneer | Pioneer is often recommended by vehicle owners as a high-quality aftermarket option that is very similar to the original factory part. Reviews mention good fit and appearance, making it a reliable choice for a balance of cost and quality. |
| Economy / Budget | Anchor, DEA (Westar) | These brands are widely available and very inexpensive. However, many experienced mechanics and vehicle owners in online forums report that these mounts can fail very quickly, sometimes within months. They are often described as "junk" and a part you may have to replace again soon. Consider these only if budget is the absolute top priority. |
Pro Tip: Inspect the Crossmember
While you are replacing the transmission mount, take a moment to inspect the transmission crossmember itself. On high-horsepower GM vehicles, these have been known to crack over time. Check for any signs of stress fractures or damage before installing the new mount.
Frequently Asked Questions (FAQ)
Is replacing a Roadmaster transmission mount a DIY job?
Yes, for most people with basic tools. The job involves safely supporting the vehicle on jack stands, using a floor jack and a block of wood to support the transmission, and removing a few bolts. It is generally an accessible repair on a rear-wheel-drive car like the Roadmaster.
How long does it take to replace the mount?
A professional shop can typically complete the job in about 1 to 1.5 hours. For a DIYer doing it for the first time, it might take 2-3 hours.
Are there any recalls for the Roadmaster transmission mount?
No. Searches of the National Highway Traffic Safety Administration (NHTSA) database show no recalls or specific technical service bulletins (TSBs) for the transmission mount on the 1991-1996 Buick Roadmaster.
Should I replace my engine mounts at the same time?
It's a good idea to inspect them. A failed transmission mount puts extra stress on the engine mounts. If they are the same age and show signs of cracking or sagging, replacing them all at once can save you from future problems and ensure a smooth ride.
Technical Specifications
OEM Part Numbers: 22188145 17982949
Standard two-bolt rubber and steel mount that attaches the transmission tailshaft housing to the frame crossmember.
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.
- Buick Roadmaster: