Description
Transmission seal degradation is one of the most common sources of fluid leaks on Big Twin engines, leading to costly damage if left unaddressed. The JAMES GASKET Trans Mainshaft Seal Kit gives you OEM-quality sealing with the reliability of U.S.-manufactured components, eliminating guesswork during your rebuild. This comprehensive kit handles the critical sealing points that factory seals compromise over time, whether you’re refreshing a 4-speed or upgrading to a modern 5- or 6-speed transmission.
- Fits 4-, 5-, 6-speed Big Twin
- OEM-equivalent performance
- Made in U.S.A.
- Mainshaft seal kit complete
- Prevents transmission fluid leaks
- Bolt-on installation
- MPN: JGI-37741-67-K






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