NATIONAL OIL SEALS 40333 Rear Seal Axle Shaft 91A-1177 2PC

( Brand: National Oil Seals ), ( Manufacturer Part Number: 40333 ), ( Type: Oil Seal ), ( Oe/oem Part Number: 91a-1177 ), ( Vintage Part: Yes ), ( Placement On Vehicle: Rear ), ( Country Of Origin: United States )

Review NATIONAL OIL SEALS Seal Ford Rear Axle Shaft Oem Vtg 2pc fits 1939-41

Introducing the National Oil Seals 40333 sealed bearing unit, specifically designed for the Ford rear axle shafts of the 1939-1941 models with the part numbers 91A-1177. This vintage automotive component is a must-have for restoring or maintaining the classic Ford vehicles of this era.

The 40333 seal is a two-piece unit, comprised of an inner seal and an outer seal. Both seals are engineered using high-quality materials, including a durable rubber compound for the seals and robust metal casings for added strength and longevity. The design of these seals ensures a perfect seal against the axle shaft, preventing oil leakage and reducing the risk of contamination.

The inner seal, also known as the lip seal, features a precision-machined groove that allows it to fit snugly against the axle shaft. This seal is designed to prevent oil from escaping as the shaft rotates, ensuring efficient lubrication and extending the life of the axle components.

The outer seal, on the other hand, is responsible for sealing the bearing against the differential housing. This seal guards against the intrusion of dirt, debris, and moisture, keeping the bearing protected and maintaining the integrity of the differential assembly.

To install these seals, simply press them onto the axle shaft and into the housing, ensuring that they are properly aligned and seated. It is essential to use the correct amount of force and to avoid over-compressing the seals, which could damage them and compromise their sealing ability.

National Oil Seals is a trusted supplier of automotive sealing solutions, with a long history of supplying high-quality products to the industry. The 40333 sealed bearing unit is no exception, offering excellent performance and reliability for classic Ford owners. By choosing this product, you can ensure a proper seal on your Ford rear axle shaft, reducing leaks, improving performance, and prolonging the life of your cherished vehicle.

National Oil Seals part number 40333 is a seal designed for Ford's 1939-41 rear axle shaft 91a-1177. Here are some pros and cons that might help you decide if this is the right seal for your vehicle.

1. OEM (Original Equipment Manufacturer) replacement: This seal is manufactured by the same company that originally supplied Ford with the seals for their rear axle shafts.

2. Designed specifically for Ford 1939-41 rear axle: This seal is engineered to fit and function properly in the Ford rear axle shaft 91a-1177.

3. Available as a set: This part number comes as a set of two seals, which can save you time and money if you need to replace both seals.

1. Cost: OEM parts can be more expensive than aftermarket alternatives.

2. Availability: Depending on your location, it might be more challenging to find this part from local auto parts stores. You may need to order it online.

The National Oil Seals 40333 is an OEM replacement seal specifically designed for Ford's 1939-41 rear axle shaft 91a-1177. The advantages include precise fitment and reliable performance. However, the cost and availability might be a concern for some. If you prioritize OEM quality and are willing to pay a premium, this seal might be the best option for you. If you're looking for a more budget-friendly alternative, consider researching aftermarket seal options.

Based on the information provided, if you are looking for an OEM replacement seal for your Ford 1939-41 rear axle and are willing to pay a premium for it, the National Oil Seals 40333 is a solid choice. If you're on a tighter budget, consider exploring aftermarket seal options to find a more affordable alternative while still ensuring proper fitment and function.

Details:

Cross-reference / OEM: Ford 91A-1177. Markings: 40333 clearly stamped on the Seals see photos. National Oil Seal #40333. Used for the rear axle shaft to help prevent gear Oil leakage at end.

Please review photos closely for exact condition. Condition: Vintage parts with normal age/ storage wear. Catalog application: Ford passenger cars 1939 1941 and trucks.

part #: 40333 prices

• $19.00-$19.95

specifications axlpar:

• for makes: Ford
• for years: 1939-41
• brand: National Oil Seals
• mpn: 40333
• type: Oil Seal
• oe/oem part number: 91a-1177
• vintage part: Yes
• placement on vehicle: Rear
• country of origin: United States

returns axlpar:

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

seller axlpar:

• # reviews: 1170
• city: Canton, Georgia
• rating: 99.1%

shipping axlpar:

• class: Standard
• type: Calculated
• transit: 4-7 Days
• cost: $7.03
• service: USPS Ground Advantage
• carrier: USPS

general axlpar:

• Car Truck Parts Accessories > Transmission Drivetrain > Axle Housings Parts
• condition: New other see details

offer axlpar:

• sold: 0
• quantity: 1
• started: March 13, 2026
• options: Ship-to-home
• availability: In Stock
• best offers: True

payments axlpar:

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

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