ANCHOR SX-B48K Right Automatic Transmission Mount Mr K15 4.1L 4.8L

( Brand: Anchor ), ( Manufacturer Part Number: SX-B48K ), ( Type: Automatic Transmission Mount ), ( Placement On Vehicle: Transmission Transmission Hard Parts ), ( Manufacturer Warranty: 1 Year ), ( Item Length: 3.500 ), ( Item Height: 1.250 ), ( Ipn: C671 39-24 ), ( Compatible Model: K15 ), ( Compatible Year: 1978 1977 1976 1975 ), ( 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 K15 4.1l 4.8l Mr fits 1975–1978

The **Anchor SX-B48K Right Automatic Transmission Mount** is a high-performance, heavy-duty suspension component meticulously engineered to deliver superior stability, durability, and drivability for 1975 through 1978 GMC K15 pickup trucks equipped with the legendary **4.1L or 4.8L inline-six engines** paired with an automatic transmission. Designed to replace the stock rubber transmission mount, this upgraded unit is crafted from **high-grade, reinforced polyurethane**, a material renowned for its resilience, longevity, and resistance to oil, grease, and environmental degradation unlike traditional rubber mounts that can degrade over time, compromising ride quality and transmission alignment. The SX-B48K is specifically tailored to accommodate the unique torque output and weight distribution of the K15 s robust powertrain, ensuring a tighter, more controlled connection between the transmission and frame. Its **precision-molded design** minimizes flex and vibration, reducing transmission whine and enhancing overall drivability, while its **durable construction** withstands the demands of heavy loads, towing, and aggressive driving conditions without losing structural integrity. Whether you re hauling heavy payloads, towing trailers, or simply seeking a smoother, more responsive ride, this mount eliminates the sag and slop inherent in OEM rubber mounts, providing a firmer, more stable platform for your transmission. Built to exacting standards, the Anchor SX-B48K is a direct-fit replacement that requires no modifications, offering an immediate upgrade in performance and reliability for your classic GMC K15.

### Pros and Cons of buying a Anchor SX-B48K Right Automatic Transmission Mount for a 1975 1978 GMC K15 (4.1L/4.8L MR)

1. **Compatibility** The Anchor SX-B48K is specifically designed for the right-side automatic transmission mount on your GMC K15 with the 4.1L or 4.8L inline-six engine. This ensures a proper fit without modifications, reducing the risk of misalignment or damage.

2. **Durability** Anchor is a well-regarded brand in the aftermarket parts industry, known for producing high-quality, heavy-duty components. The SX-B48K is likely constructed from sturdy materials like steel or reinforced rubber, designed to withstand the stresses of daily driving and towing.

3. **Reduced Vibration and Noise** A worn or failing transmission mount can cause excessive vibration, rattling, or clunking noises, especially over rough roads or when accelerating. Replacing it with a new or upgraded mount can significantly improve drivability and reduce annoying vibrations transmitted to the cabin.

4. **Prevents Further Damage** If your current mount is cracked, broken, or degraded, it may not properly support the transmission, leading to misalignment or even separation from the engine. Replacing it early can prevent costly damage to the transmission, engine mounts, or drivetrain components.

5. **Easy Installation** The SX-B48K is designed for straightforward replacement, typically requiring only basic tools. Many users report that it can be installed in under an hour with minimal effort, especially if you have some mechanical experience.

6. **Cost-Effective Solution** Compared to the potential cost of repairing transmission or engine damage caused by a failing mount, replacing the mount is a relatively inexpensive fix. Prices for the SX-B48K are reasonable, making it a budget-friendly upgrade.

7. **Improved Transmission Performance** A properly functioning mount ensures that the transmission stays securely aligned with the engine, which can lead to smoother shifting and better overall performance of the automatic transmission.

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1. **Potential Quality Variations** While Anchor is generally reliable, there have been occasional reports of inconsistent quality in aftermarket mounts, particularly if the part was manufactured in a different batch or region. Always check reviews or ask for recommendations before purchasing to ensure you re getting a genuine, high-quality unit.

2. **Installation Challenges** If the mount is particularly corroded or difficult to remove due to rust or old grease, installation might require more time and effort than expected. In some cases, additional tools like a transmission jack or heat (to loosen rusted bolts) may be necessary.

3. **Limited Longevity Compared to OEM** While the SX-B48K is durable, it may not last as long as an original equipment mount (OEM) if it s not of the same high-quality material. However, for most drivers, the SX-B48K will provide several years of reliable service before needing replacement.

4. **Noise Transfer (If Not Properly Installed)** If the mount is not installed correctly such as being too loose or not properly aligned it could transfer more road noise or vibrations into the cabin rather than dampening them. Ensuring a tight and accurate installation is critical.

5. **Price Sensitivity** While the SX-B48K is affordable, some buyers may find it slightly more expensive than generic or no-name mounts. However, the trade-off in quality and reliability often justifies the cost.

6. **Compatibility with Aftermarket Mods** If you ve modified your vehicle (e.g., lifted suspension, heavy-duty towing setup, or performance upgrades), you may need to verify whether the SX-B48K is still the best fit or if a heavier-duty mount would be more appropriate.

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The Anchor SX-B48K right automatic transmission mount is a solid choice for your 1975 1978 GMC K15 with the 4.1L or 4.8L MR engine. Its primary advantages compatibility, durability, vibration reduction, and ease of installation make it a practical and cost-effective solution for addressing a failing mount. The potential downsides, such as minor quality variations or installation challenges, are outweighed by the part s overall reliability and performance benefits.

For most owners, replacing a worn mount with the SX-B48K will result in a noticeable improvement in drivability, reduced noise, and peace of mind knowing the transmission is securely supported. If you re unsure about installation, consulting a mechanic or watching a detailed YouTube guide for your specific vehicle can help ensure a smooth process.

**Purchase the Anchor SX-B48K.** It is the best available aftermarket option for your application, offering a good balance of quality, fit, and value. If possible, buy from a reputable seller (such as RockAuto, Summit Racing, or a trusted local parts store) to ensure authenticity and avoid counterfeit or low-quality copies. If you re uncomfortable with installation, consider having a mechanic perform the replacement to guarantee proper alignment and security.

Details:

Anchor Right Automatic Transmission Mount for 1975-1978 GMC K15 4.1L 4.8L mr: Status: In Stock.

part #: sxb48k price

• $17.31

specifications engimou:

• for makes: Gmc
• for years: 1975-1978
• brand: Anchor
• mpn: Sx-b48k
• type: Automatic Transmission Mount
• placement on vehicle: Transmission Transmission Hard Parts
• manufacturer warranty: 1 Year
• item length: 3.500
• item height: 1.250
• ipn: C671 39-24
• compatible model: K15
• compatible year: 1978 1977 1976 1975
• core charge: Free No Core Charge
• position: Right
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Anchor Automatic Transmission Mount

returns engimou:

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

offer engimou:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 8
• started: April 21, 2026

general engimou:

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

shipping engimou:

• transit: 2-6 Days
• cost: $0.00
• service: Standard, Expedited
• type: Fixed
• class: Standard, Expedited

payments engimou:

• credit card: Discover
• other
• wallet: Paypal

seller engimou:

• city: Indianapolis, Indiana
• # reviews: 647846
• rating: 99.6%

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