


🔧 Seal the deal with National’s trusted transmission extension housing seal!
The National 711103 Automatic Transmission Extension Housing Seal features a spring-loaded multi-lip design that ensures superior sealing performance. It operates reliably across a broad temperature range (-20°F to 300°F) and resists swelling in hydrocarbon fluids, making it ideal for durable transmission repairs. Manufactured by DRiV Incorporated, this compact and lightweight seal embodies over 75 years of National’s industry-leading expertise.
| Manufacturer | DRiV Incorporated | 
| Brand | NATIONAL | 
| Model | Automatic Transmission Extension Housing Seal | 
| Product Dimensions | 2.03 x 7.11 x 7.11 cm; 22.68 g | 
| Item model number | 711103 | 
| Exterior | Machined | 
| Manufacturer Part Number | 711103 | 
| Item Weight | 22.7 g | 
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