The Enginetech S7756 is a 1-piece ptfe/viton rear main seal engineered as a stock replacement for 2001-2022 Ford, Lincoln, Mazda, Mercury engine applications.
Important Notes
- 1-Piece design: verify your engine uses a 1-piece seal before ordering - 1-piece and 2-piece seals are not interchangeable.
- Kit contents: includes metal retainer for a complete rear-main rebuild.
- PTFE/Viton composite: premium-grade sealing material combining PTFE low-friction with Viton high-temperature resistance.
Specifications
| Brand | Enginetech |
| Part Number | S7756 |
| Product Type | Rear Main Seal |
| Design | 1-Piece |
| Material | PTFE/Viton |
| Kit Contents | Metal retainer |
| Country of Origin | United States |
| OEM / Aftermarket Cross References | Victor Reinz:67756, DNJ:RM446 |
Vehicle Fitment
- Years: 2001-2022
- Makes: Ford, Lincoln, Mazda, Mercury
- Models: 3, 3 Sport, 5, 6, B2300, CX-30, CX-5, CX-7, CX-9, EcoSport, Escape, Focus, Fusion, MKZ, MX-5 Miata, Mariner, Milan, Ranger, Transit Connect, Tribute
The rear main seal (also called the crankshaft rear seal) prevents engine oil from leaking between the back of the crankshaft and the transmission bell housing. Over miles and heat cycles, the seal hardens, cracks, or takes a permanent compression set - producing the characteristic oil drip at the bell housing and, if left unchecked, oil contamination of the clutch disc or flex plate. Replacing the rear main seal during a transmission service or engine rebuild restores the final oil seal between the crankshaft and drivetrain, preventing slow leaks and protecting the clutch and flywheel from contamination.
