MACK 49KH339B Rear Seal Cover

( Manufacturer Part Number: 49KH339B ), ( Part Type: Seal Cover Aluminum ), ( Bin: A13 ), ( Country Of Origin: United States )

Review MACK Oem Aluminum Rear Seal Cover

The Mack 49KH339B Rear Seal Cover is an essential component for maintaining the optimal performance and efficiency of Mack trucks with model numbers starting from 49. This part, specifically designed for Mack heavy-duty vehicles, serves a critical role in preventing oil leaks from the rear of the engine.

Constructed from durable, high-quality materials, the Mack 49KH339B Rear Seal Cover boasts a robust design capable of withstanding the rigors of commercial and industrial applications. It features an O-ring seal that ensures a tight fit around the engine, preventing oil from escaping. The cover is also ribbed for added strength, which helps distribute the force of the engine's movement evenly, minimizing stress on the seals and reducing the likelihood of leaks.

The Mack 49KH339B Rear Seal Cover is engineered to be an easy drop-in replacement for the original part. It comes with all necessary mounting hardware, making the installation process hassle-free for most DIY mechanics. Additionally, it is precision-machined to match the contours of the engine for a perfect fit, ensuring a seamless integration.

This Mack rear seal cover is an investment in the longevity and reliability of your vehicle. By preventing oil leaks, you can save on costly repairs, reduce downtime, and maintain the overall health of your Mack truck. Whether you're operating a fleet of commercial vehicles or using your Mack for personal transportation, the Mack 49KH339B Rear Seal Cover is an indispensable addition to your maintenance program.

Buying a Mack 49kh339b rear seal cover can be a good investment for those who own Mack trucks with this specific model number. Here are some pros and cons to help you make an informed decision:

1. Prevents Leaks: The main function of a rear seal cover is to prevent leaks from the rear differential or transmission. By replacing a worn or damaged cover, you can prevent potential damage to other components and save yourself from costly repairs.

2. Improved Performance: A properly sealed rear differential or transmission can lead to improved performance. The lubrication system will function more efficiently, and the components will not be subjected to unnecessary wear and tear.

3. Cost-Effective: Replacing a rear seal cover is generally a cost-effective solution compared to other repairs. The cover is a relatively inexpensive part, and the labor costs are usually not excessive.

1. Wear and Tear: Rear seal covers are subjected to a lot of wear and tear, especially in heavy-duty applications. Over time, the seals can dry out, crack, or break, leading to leaks and the need for replacement.

2. Availability: Mack rear seal covers may not be readily available at all auto parts stores. It's essential to order the correct part number, such as the Mack 49kh339b, to ensure a proper fit and function.

3. Installation: Installing a rear seal cover can be a time-consuming and labor-intensive process. It may require draining the differential or transmission, removing the old cover, installing the new one, and refilling the fluid.

In conclusion, buying a Mack 49kh339b rear seal cover can provide several benefits, including preventing leaks, improving performance, and being cost-effective. However, it's essential to consider the potential drawbacks, such as wear and tear, availability, and installation. Ultimately, if you suspect that your Mack truck's rear differential or transmission is leaking, it's best to replace the seal cover as soon as possible to avoid more extensive and expensive repairs.

If you own a Mack truck and suspect that you need to replace the rear seal cover, it's recommended to order the correct part number, such as the Mack 49kh339b, from a reputable auto parts supplier. Make sure to have the necessary tools and fluids on hand to ensure a smooth installation process. If you're not comfortable performing the repair yourself, consider taking your truck to a qualified mechanic to ensure that the job is done correctly.

Details:

Alto of my parts are new old stock and have been shelved for some time moved around several times so they show scratches, dust, many missing the original box, but will always be described correctly, I take best pictures can. I do not guarantee any used bearings that may be on them.

part #: 49kh339b prices

• $30.00-$120.00

specifications commerciatruc:

• for makes: Mack
• mpn: 49kh339b
• part type: Seal Cover Aluminum
• bin: A13
• country of origin: United States

payments commerciatruc:

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

returns commerciatruc:

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

shipping commerciatruc:

• service: USPS Ground Advantage, USPS Priority Mail Express, USPS Priority Mail
• transit: 4-8 Days
• cost: $16.10
• class: Standard, Expedited
• carrier: USPS
• type: Calculated

general commerciatruc:

• Parts Accessories > Commercial Truck Parts > Other Commercial Truck Parts
• condition: New other see details

seller commerciatruc:

• # reviews: 1459
• rating: 100.0%
• city: Pikeville, Kentucky

offer commerciatruc:

• sold: 0
• options: Ship-to-home
• quantity: 1
• started: May 31, 2026
• availability: In Stock

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