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National Oil Seal 3404 Automatic Transmission Oil Pump Seal

(Ford F-150 1989-2010, Mustang 1992-2004, F-250 Super Duty 1999-2005, Explorer 1996-2001, F-350 Super Duty 1999-2005, Expedition 1997-2006 + 44 more models)

Manufacturer

Picture for manufacturer National Oil Seal

Part Number

3404
9 reviews
Sale Price

$12.20

In Stock (10+)

delivery box

Usually delivered within 2 days

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Product Details

The National Oil Seal 3404 is a precision-engineered automatic transmission oil pump seal designed to provide reliable sealing performance and prevent fluid leaks in automatic transmissions. This front-mounted seal is manufactured with high-quality silicone material that offers excellent resistance to heat, wear, and transmission fluids under demanding operating conditions.

Key Specifications:

  • Shaft diameter: 1.996 inches
  • Outside diameter: 2.751 inches
  • Flanged outside diameter: 3.020 inches
  • Housing bore: 2.743 inches
  • Width/thickness: 0.325 inches
  • Material: Silicone
  • Clockwise-spiral lip design for enhanced sealing efficiency

Features and Benefits:

  • Durable silicone construction provides superior resistance to transmission fluids and high temperatures
  • Clockwise-spiral lip design maintains consistent contact with the shaft for optimal sealing
  • Prevents transmission fluid leaks that can lead to low fluid levels and costly transmission damage
  • Maintains proper hydraulic pressure within the transmission oil pump system
  • Engineered to meet OE specifications for precise fit and reliable performance
  • Helps minimize premature wear of transmission components caused by fluid loss

National Oil Seals has been providing premium sealing solutions for over 75 years and maintains a reputation as one of the most respected brands in the automotive aftermarket. This seal is designed as a direct OE replacement part for professional repairs and restoration work.

Products specifications

Fits

Ford F-150 1989-2010, Mustang 1992-2004, F-250 Super Duty 1999-2005, Explorer 1996-2001, F-350 Super Duty 1999-2005, Expedition 1997-2006, F-250 1989-99, Bronco 1989-96, Crown Victoria 1992-2011, Excursion 2000-05 + 40 more models

Agricultural Equipment

N

Application Specific

Y

Car Light Truck

N

Engine Specific

N

Freight Class

60

Heavy Duty Truck

N

High Performance

Y

Industrial Off Highway Equipment

N

Marine

N

Medium Duty Truck

N

Motorcycle ATV

N

Non Vehicle Specific

N

Personal WaterCraft

N

Small Engine

N

SnowMobile

N

Transmission Specific

N

Feature 2

Design Type: Spring Loaded; Single-Lip

Feature 3

Good dry heat resistance

Feature 4

Excellent low temperature capability

Feature 5

Temperature Range: -80F to 350F; -62C to 176C

Footnote

Clockwise-Spiral Lip Design

Outside Diameter (mm)

69.880

Part Description

Oil Seal

Part Type

Seals

Series

03000

Type

75

Width (inch)

0.325

WIDTH (MM)

8.260

Flanged Outside Diameter (Inch)

3.020

Flanged Outside Diameter (MM)

76.710

Housing Bore (MM)

69.670

Shaft (Inch)

1.996

Shaft (MM)

50.700

Shaft Size (Inch)

1.996

Amazing prices, cheapest I could find anywhere. Only down side is the shipping is more than it should be.

Very happy with my purchase and product from Autoplicity! Highly recommend.

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I bought a set of 3 MSD Ignition coils for my 2001 Impala LS 3.8 and I am very impressed and satisfied with my purchase. I got an email right away stating what I purchased and within a day or two I recieved a shipping confirmation. My ignition coils arrived fast and I had no problem with the coils been bad or broken. The coils are awesome. There is a significant difference between my old ones and these 3 new ones. The car is very responsive to the accelerator and as stated in the MSD website, the car gained some horsepower. I don't have to press the accelerator in that much to gain the power I need. I'm impressed overall.

Great product and half the price of any one else I've shopped would recommend this to everyone.

autoplicity has the lowest price and fast service .I will definitely use autoplicity for my next auto parts purchase

At first I did not expect Autoplicity to even carry this part, but in fact they did. Placed the order and I received the part quickly. They were the cheapest for the part after searching nearly everywhere. Will order from them again.<br>Order #8334

Great prices and very quick shipping! Thanks

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