Automatic Transmission Mount Guide for 1959 Chevrolet 3E Trucks
Secure your classic truck's drivetrain and reduce vibrations with the right transmission mount.
- Listen for clunks and feel for vibrations, as these are the most common signs of a failed mount.
- Before ordering, you MUST identify which transmission is in your truck, as many have been swapped with modern units.
- Anchor and DEA are budget-friendly brands, but don't expect original factory quality or longevity.
- Replacing the mount is a simple DIY job, but be prepared for rusty bolts on a classic truck.
Is Your Transmission Mount Failing?
A worn-out transmission mount on a classic truck like the '59 3E can cause noticeable issues. Because these mounts are made of rubber and steel, the rubber part can crack, collapse, or become soaked with oil over time, making it soft and ineffective.
Common Symptoms of a Bad Mount:
- Clunking or Thudding Noises: You may hear a loud clunk when you accelerate, decelerate, or shift from park into drive or reverse. This is the sound of the transmission moving excessively and hitting the frame.
- Excessive Vibration: If you feel a new or worsening vibration through the floor or seat, especially while idling in gear, it could be the mount. A failed mount can no longer absorb the normal vibrations from the drivetrain.
- Visible Movement: You can sometimes see a failed mount. Have a helper put the truck in gear with the parking brake set and brakes applied, and gently apply the throttle. If you see the transmission lift or move excessively, the mount is likely bad.
A Word on Transmission Swaps
Many 1959 trucks are no longer running their original factory transmission. It is very common for owners to have swapped in a more modern automatic like a Turbo 350, Turbo 400, or 700R4. The mount you need depends entirely on the transmission currently in your truck and the crossmember used. Always inspect your current setup before ordering a replacement part.
Choosing the Right Aftermarket Mount
For a 1959 vehicle, finding a new original equipment (OEM) part from Chevrolet is not possible. Your options are limited to the aftermarket. The most common and affordable brands you will find are Anchor and DEA.
- Economy Brands (Anchor, DEA): Both Anchor and DEA are budget-friendly brands. Reviews for both are mixed. Some users report they fit and work without issue, while others complain about the rubber being too hard, which can cause more vibrations than the old part. There are also reports of premature failure. For a classic truck that sees limited use, these mounts can be a cost-effective solution. Given the low price, some owners choose to buy one of each to see which appears better constructed before installing.
Frequently Asked Questions
Can I still drive with a bad transmission mount?
You can, but it's not recommended for long. A failed mount puts extra stress on your engine mounts, driveshaft U-joints, and exhaust system. It's best to replace it as soon as you notice a problem to prevent damage to other components.
What's the real difference between Anchor and DEA?
Both are considered economy-tier aftermarket brands with similar reputations for mixed quality. Some forum users have preferences, but there is no clear winner between them; both are known for being a functional, low-cost replacement, but may not last as long or absorb vibration as well as original parts.
Why can't I find an original GM part?
Automakers typically stop producing most mechanical parts for vehicles after a few decades. For a 1959 model, new OEM parts are no longer manufactured. The only options for an "original" part would be finding a New Old Stock (NOS) part, which is rare and expensive, or having your original mount rebuilt by a specialty service.
How do I know if my truck has the original transmission?
Identifying your transmission is key. Research images of the original Powerglide transmission and compare it to what is in your truck. Modern transmissions like the TH350 have a distinct pan shape. Many online forums for classic Chevy trucks have guides to help you identify which transmission you have.
Technical Specifications
The automatic transmission mount is constructed of a steel frame with a vulcanized rubber block to absorb vibration and support the transmission.
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.