Automatic transmission oil pan gaskets work in oil, heat, bolt compression and repeated service conditions. The correct material depends on the sealing surface, fluid environment, expected service life and the buyer's market requirements.
NBR for common oil-resistant applications
NBR is widely used for oil-resistant sealing. For many transmission oil pan gasket references, it gives a practical balance of cost, manufacturability and oil resistance. Buyers should still confirm hardness, thickness, dimensions and compression requirements.
ACM for selected higher-temperature requirements
ACM may be used for selected references where elevated oil and heat resistance is required. It should be confirmed against the target application and sample requirements rather than selected only because it sounds higher grade.
Metal bonded designs for controlled compression
Some modern transmission pans use a metal carrier with molded or bonded sealing features. This construction can help control compression and maintain shape, but tooling, coating, bead design and inspection points must be reviewed carefully.
Cork rubber for legacy and service references
Cork rubber remains useful across many legacy or service-market references because of its compressibility. Buyers should confirm whether the market expects cork rubber, molded rubber or a different construction before ordering.
What to send for material review
- Reference number, transmission code and target vehicle market if known.
- Photos or sample showing material, surface texture and bolt-hole structure.
- Expected temperature, fluid exposure and service conditions if available.
- Required packaging and whether the gasket will be sold alone or in a kit.