ANCHOR SX-5AM9 Right Automatic Transmission Mount 4.1L 4.8L

( Brand: Anchor ), ( Manufacturer Part Number: SX-5AM9 ), ( Type: Automatic Transmission Mount ), ( Placement On Vehicle: Transmission Transmission Hard Parts ), ( Manufacturer Warranty: 1 Year ), ( Item Length: 5.120 ), ( Item Height: 3.380 ), ( Item Width: 4.170 ), ( Ipn: C661 33-32 ), ( Compatible Year: 1984 1983 1982 1981 1980 1979 ), ( Core Charge: Free No Core Charge ), ( Position: Right ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Anchor Automatic Transmission Mount )

Review ANCHOR Right Automatic Transmission Mount Gmc 4.1l 4.8l Hz fits K1500 1979–1984

The **Anchor SX-5AM9 Right Automatic Transmission Mount** is a high-performance, heavy-duty suspension component meticulously engineered to enhance stability, reduce transmission vibration, and improve overall drivability in 1979 through 1984 GMC K1500 models equipped with the iconic 4.1L or 4.8L V8 engines. Designed specifically for the right-side automatic transmission mount position, this mount is crafted from durable, high-grade rubber reinforced with a robust steel core, ensuring unmatched durability under the demanding stresses of towing, hauling, and aggressive driving. The SX-5AM9 is part of Anchor s premium **SX Series**, which is renowned for its precision engineering and superior load-bearing capacity, making it an ideal upgrade for truck owners seeking to eliminate the harsh rattles, clunks, and transmission bounce that often plague stock mounts over time. Whether you re navigating rough highways, conquering off-road trails, or simply enjoying the smooth ride of a well-tuned suspension, this mount delivers a firm yet compliant grip, effectively isolating the transmission from road imperfections while maintaining optimal alignment. Its universal fit ensures compatibility with a wide range of aftermarket and factory transmission setups, including those paired with performance parts like heavy-duty flywheels, dual-mass flywheels, or custom transmission coolers. Built to withstand the rigors of daily use, the SX-5AM9 is a straightforward yet impactful modification that restores confidence in your truck s handling, reduces wear on related components, and contributes to a more refined driving experience all while maintaining the integrity of your vehicle s factory alignment and drivetrain. For those who demand nothing less than excellence in suspension performance, the Anchor SX-5AM9 is the perfect blend of strength, precision, and reliability.

### Pros and Cons of buying a Anchor SX-5AM9 Right Automatic Transmission Mount for a 1979-1984 GMC K1500 (4.1L or 4.8L)

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#### **Pros**

1. **Improved Transmission Mount Durability**

The stock transmission mount on older GMC K1500 trucks with automatic transmissions (particularly those with the 4.1L or 4.8L V8) can wear out over time due to constant vibration, heat, and stress. The Anchor SX-5AM9 is designed as an upgraded, heavy-duty replacement, offering better resistance to fatigue and cracking. This can extend the life of the mount and reduce the risk of sudden failure, which could lead to transmission damage or driveline separation.

2. **Reduced Vibration and Noise**

The stock mount may become soft or degraded, allowing excessive movement of the transmission. The Anchor SX-5AM9 is engineered to provide a firmer, more stable connection between the transmission and frame. This can minimize unwanted vibration, rattling, or clunking noises, especially during acceleration, braking, or rough road conditions. A quieter, smoother ride is often a noticeable improvement for drivers.

3. **Better Heat Dissipation**

Automatic transmissions generate significant heat, especially under heavy loads or in stop-and-go traffic. The Anchor SX-5AM9 is typically made from materials that offer better heat resistance compared to the stock mount. Improved heat dissipation can help prevent premature failure of the mount or related components, such as the transmission pan or flexplate.

4. **Compatibility and Fitment**

Anchor is a reputable manufacturer known for producing high-quality aftermarket parts. The SX-5AM9 is specifically designed for the 1979-1984 GMC K1500 with 4.1L or 4.8L V8 engines and automatic transmissions (likely TH350 or TH400). It should fit without modification, though always verifying fitment with your vehicle s exact configuration is advisable.

5. **Easier Installation**

While transmission mounts can be tricky to replace, Anchor parts are often designed with user-friendly features such as clear mounting holes, pre-drilled or pre-punched hardware, and straightforward instructions. This can make the installation process more manageable for DIYers compared to dealing with a cracked or broken stock mount.

6. **Cost-Effective Upgrade**

Replacing a failed transmission mount can be costly if it damages other components (e.g., the transmission housing, frame rails, or driveline). Proactively upgrading to the Anchor SX-5AM9 is often cheaper than waiting for a catastrophic failure. The part itself is relatively affordable compared to the potential repair costs of a damaged transmission or frame.

7. **Potential Warranty Coverage**

Anchor offers warranties on many of its products, which can provide peace of mind. If the mount fails due to a manufacturing defect within the warranty period, Anchor may replace it at no additional cost. This adds an extra layer of protection for your investment.

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#### **Cons**

1. **Upfront Cost**

While the Anchor SX-5AM9 is not excessively expensive, it is still an additional expense beyond the cost of labor if you choose to have it installed by a professional. For those on a tight budget, this may be a deterrent, especially if the stock mount is still functioning adequately. However, considering the potential long-term savings, this is often a minor drawback.

2. **Installation Complexity**

Replacing a transmission mount requires lifting the vehicle, removing the transmission or parts of the driveline, and ensuring proper alignment. While the Anchor mount is designed for ease of installation, the process can still be labor-intensive and time-consuming, particularly for inexperienced DIYers. If you lack the necessary tools, skills, or patience, professional installation may be necessary, adding to the cost.

3. **Potential for Over-Tightening**

Some drivers or mechanics may be tempted to overtighten the mount bolts during installation, believing that a tighter fit means better security. However, over-tightening can lead to warping of the mount or damage to the transmission housing or frame. It s crucial to follow the manufacturer s torque specifications to avoid this issue.

4. **Limited Aesthetic Appeal**

The Anchor SX-5AM9 is a functional upgrade rather than an aesthetic one. If you prioritize the appearance of your truck s undercarriage, the stock mount may look more original. While the difference is subtle, some enthusiasts prefer to maintain the factory look unless there s a clear performance or reliability benefit.

5. **Mixed Reviews on Longevity**

While Anchor is a well-regarded brand, individual experiences with the SX-5AM9 can vary. Some users report that the mount lasts for years without issue, while others may experience premature wear, especially if the vehicle is driven aggressively or in extreme conditions (e.g., heavy towing, off-roading, or extreme temperatures). As with any part, quality can vary slightly between units, and proper installation is key to maximizing its lifespan.

6. **Compatibility with Aftermarket Modifications**

If your truck has aftermarket modifications (e.g., lifted suspension, custom exhaust, or heavy-duty driveline components), you may need to ensure that the Anchor SX-5AM9 is still the right fit. In some cases, additional adjustments or a different mount may be required to accommodate these changes.

7. **Potential for Misalignment**

If the mount is not installed correctly either too loose or too tight it can lead to misalignment of the transmission or driveline. This could result in unusual noises, vibration, or even damage to the transmission or universal joints over time. Careful attention to alignment during installation is essential.

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### **Conclusion**

The Anchor SX-5AM9 Right Automatic Transmission Mount is a practical and worthwhile upgrade for a 1979-1984 GMC K1500 with a 4.1L or 4.8L V8 and automatic transmission. Its primary advantages lie in improved durability, reduced vibration, better heat resistance, and long-term reliability. These benefits outweigh the minor drawbacks, such as the upfront cost and installation complexity, especially when considering the potential consequences of a failed stock mount.

For most owners, the decision to install the Anchor SX-5AM9 is a no-brainer if they are experiencing issues with their current mount or want to preemptively avoid future problems. The part is well-supported by its manufacturer, and the potential for cost savings (both in avoiding repairs and in improved transmission longevity) makes it a smart investment.

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### **Recommendation**

- Your current transmission mount is cracked, worn, or showing signs of failure (e.g., excessive movement, unusual noises, or heat damage).

- You frequently drive in rough conditions, tow heavy loads, or engage in off-roading, which increases stress on the transmission mount.

- You want to reduce vibration and noise for a smoother driving experience.

- You prefer a proactive approach to maintenance rather than waiting for a catastrophic failure.

- Your stock mount is still in good condition and not causing any issues.

- You are on a very tight budget and cannot afford the part or labor for installation.

- You lack the mechanical skills or tools to perform the installation safely and correctly.

For the average owner of a 1979-1984 GMC K1500 with an automatic transmission, the Anchor SX-5AM9 is a **highly recommended upgrade**. It offers a balance of cost-effectiveness, reliability, and performance benefits that justify the investment. If you re unsure about the condition of your current mount, have it inspected by a mechanic if it s showing signs of wear, replacing it with the Anchor SX-5AM9 is a smart move to protect your transmission and avoid costly repairs down the road.

Details:

Anchor Right Automatic Transmission Mount for 1979 1984 GMC K1500 4.1L 4.8L hz: Status: In Stock.

part #: sx5am9 prices

• $22.44-$25.85

specifications engimou:

• for models: K1500
• for makes: Gmc
• for years: 1979-1984
• brand: Anchor
• mpn: Sx-5am9
• type: Automatic Transmission Mount
• placement on vehicle: Transmission Transmission Hard Parts
• manufacturer warranty: 1 Year
• item length: 5.120
• item height: 3.380
• item width: 4.170
• ipn: C661 33-32
• compatible year: 1984 1983 1982 1981 1980 1979
• core charge: Free No Core Charge
• position: Right
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Anchor Automatic Transmission Mount

seller engimou:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 638717

returns engimou:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

payments engimou:

• wallet: Google-pay
• credit card: Mastercard
• other

shipping engimou:

• service: Standard, Expedited
• transit: 3-6 Days
• cost: $0.00
• type: Fixed
• class: Standard, Expedited

general engimou:

• condition: New
• Car Truck Parts Accessories > Engines Engine Parts > Engine Mounts

offer engimou:

• sold: 0
• quantity: 6
• options: Ship-to-home
• started: March 29, 2026
• availability: In Stock

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