Vehicle Fitment
| Make | Model | Year |
|---|---|---|
| Dodge | M-Series Chassis | 1968-1974 |
| RM300 | 1971, 1973-1974 | |
| RM350 | 1971, 1974 | |
| RM400 | 1973-1974 | |
| Ford | M-400 | 1971-1973 |
Product Details
Automatic Transmission Extension Housing Seal (7300S) by National®. With Long Boot. Width: 0.421". Inside Diameter: 1.685". Outside Diameter: 2.506". Housing Bore: 2.500". Flanged Outside Diameter: 2.850". Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge technology that generates a dynamic pumping action to keep harmful contaminants such as dirt, moisture, etc. out of the seal and other wheel-end components.
Specifications
| Flanged Outside Diameter (Inch): 2.850 in |
| Flanged Outside Diameter (MM): 72.390 mm |
| Helix Type: Counter-Clockwise-Spiral Lip Design |
| Housing Bore (Inch): 2.500 in |
| Housing Bore (MM): 63.500 mm |
| Inside Diameter (Inch): 1.685 in |
| Inside Diameter (mm): 42.800 mm |
| Material: Polyacrylate |
| Outside Diameter (Inch): 2.506 in |
| Outside Diameter (mm): 63.650 mm |
| Overall Width with Side Lip (MM): 31.750 mm |
| Overall Width with Side Lip (Inch): 1.250 in |
| Redicoat: Yes |
| Sealing Material: Polyacrylate |
| Series: 7000 |
| Shaft (Inch): 1.685 in |
| Shaft (MM): 42.800 mm |
| Thickness (Inch): 0.421 in |
| Thickness (mm): 10.693 mm |
| Type: 79 |
| Width (Inch): 0.421 in |
| Width (mm): 10.693 mm |
Features
- Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminants
- A patent-pending National Dynamic Edge technology allows for maximum protection
- Helps prevent premature bearing failure
- Unmatched durability under the most grueling conditions
- Constructed to meet OE configurations
- Low swell in hydrocarbon fluids
- Design type: spring loaded: multi-lip
- Provides good low temperature capability
- Temperature range: -40°F to 225°F: -40°C to 107°C
- Delivers quality and reliable performance for every type of repair
Engineered for performance, National oil seals deliver superior protection and long service life thanks to premium material construction and a patent-pending National Dynamic Edge technology used in their manufacture. This innovation aggressively deflects dirt, liquid, and other contaminants that can lead to premature seal and bearing damage and diminished wheel-end performance. The National Dynamic Edge design consists of an integral sinusoidal wave that produces a dynamic pumping action to move contaminants away from the seal. This innovation ensures maximum protection from environmental contaminants under even the most adverse conditions. This part is engineered to meet OE specs to perfectly fit your vehicle.
National®, a brand of the Federal-Mogul Corporation, is a well-known name not only in the automotive industry, but also on the agricultural and industrial markets. For over 60 years, National has built a well-earned reputation offering high-end, premium products that meet or exceed the OE requirements across a wide range of wheel bearings and oils seal needs. The team at National keeps pace with the industry and provides ultimate solutions to meet the needs of today’s vehicles. The company has modern equipment, technology, and the expertise to coordinate the development, manufacturing, and testing of each product for maximum satisfaction of customers' needs. National is a premier choice when it comes to complete wheel end solutions.
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