Product Description
National Differential Pinion Seal | National 5778
The National 5778 is a differential pinion seal designed to prevent fluid leakage and contamination at the pinion shaft. This replacement seal meets or exceeds OEM specifications for reliable sealing performance in heavy-duty differential applications.
Key Features
- Prevents differential fluid leakage at the pinion shaft
- OEM-equivalent construction for direct replacement
- Engineered for heavy-duty truck and automotive differentials
- Durable seal design resists wear and maintains integrity under operating conditions
Specifications
| Brand | National |
| Part Number | 5778 |
| Weight | 12.12 lb |
| Dimensions (L × W × H) | 3.25 × 0.88 × 3.25 in |
| UPC | 00724956161720 |
Cross References
| CHECKER MOTORS CORP. | 010701 |
| CHRYSLER -PLYMOUTH | 02961190 |
| SPICER AXLE-TRANS DIVS DANA CORP. | 142234 |
| SPICER AXLE-TRANS DIVS DANA CORP. | 14223 |
| CHRYSLER -PLYMOUTH | 04213202 |
| DANA CORPORATION | 14223 |
| PACCAR PARTS | 15788CHR |
| CHRYSLER -PLYMOUTH | 200420 |
| TRANSCOM INC | 155316PSB |
| WILLYS | 200420 |
⚠️ Prop 65 Warning
WARNING: This product can expose you to lead, nickel, and other chemicals, which are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
