National
National 5778 Differential Pinion Seal
National 5778 Differential Pinion Seal
SKU:N195778
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- Genuine brand-name parts
- Ships from US warehouse
- 30-day returns
The National 5778 is a differential pinion seal. It is a new, genuine National part with the manufacturer warranty, shipped from the closest US warehouse.
Key features
- Design type: spring loaded; multi-lip
- Temperature range: -20°F to 300°F / -29°C to 49°C
- Resistance to EP lubricants
- Low swell in hydrocarbon fluids
- Delivers quality and reliable performance for every type of repair
- Material: Polyacrylate
- Temperature range: Minus 20 degree Fahrenheit to 300 degree Fahrenheit
Specifications
| Brand | National |
|---|---|
| Manufacturer part number | 5778 |
| Part type | Auto Accessory |
| UPC / GTIN | 724956161720 |
| Weight | 0.50 lb |
| Dimensions (L × W × H) | 3.2 × 0.9 × 3.2 in |
| Category | Engine & Drivetrain |
| Condition | New — genuine brand-name part |
| Warranty | Manufacturer warranty |
Questions
Will this fit my vehicle?
Match the manufacturer part number 5778 to your current part, or send us your VIN and we will confirm the fit before you order.
How fast does it ship?
Orders ship from the closest US warehouse, normally within 1–3 business days, with tracking by e-mail.
Is this a genuine National part?
Yes — new and genuine National, with the manufacturer warranty.
Can I return it?
Yes. Unused items can be returned within 30 days — see our refund policy for the details.
Shipping & delivery
Shipping & delivery
Orders ship from the distributor warehouse closest to you, normally within 1–3 business days of purchase. Standard ground delivery takes 3–7 business days in the continental US; expedited options are shown at checkout. Oversized items (bumpers, running boards, large tonneau covers, some marine equipment) ship LTL freight — we contact you to schedule delivery and a signature is required.
Returns & warranty
Returns & warranty
Unused, uninstalled parts in original packaging can be returned within 30 days of delivery. A restocking fee of up to 20% may apply depending on the product and supplier, and return shipping is the buyer’s responsibility unless the item arrived defective, damaged or incorrect. Every product carries the full manufacturer warranty. Contact us with your order number to start a return.
Fitment & part numbers
Fitment & part numbers
Verify fitment with the manufacturer part number shown above and your vehicle’s year, make, model and trim. If the listing says “Fits select…”, confirm your exact application before ordering. Not sure? Send us your VIN and the part number and we’ll check it for you.
