Description
When your Dual Power transmission starts weeping fluid around the external housing, it’s usually this external sealing ring that’s given up after years of hard work. This ring sits right in the line of fire between the transmission’s hydraulic pressure and everything else under your tractor, and when it fails, you’ll notice the telltale signs pretty quick—oil spots where you park and maybe some slipping in the powershift operation.
What You’re Getting
- External sealing ring designed specifically for pre-11/95 Ford 40’s Dual Power systems
- Precision-molded construction that maintains proper seal compression under hydraulic pressure
- Direct replacement that restores factory-tight operation to your transmission housing
- Compatible with the complete rebuild kit 404606 when you’re doing a full transmission overhaul
Built for Real Farm Work
This sealing ring fits Ford New Holland 40 Series tractors including models 5640, 6640, 7740, 7840, 8240, and 8340, plus TS Series models that came equipped with Dual Power transmission systems. These tractors are workhorses in medium to large-scale farming operations, handling field cultivation, hay production, livestock management, and heavy implement work where consistent transmission performance is critical.
Made to Last
This sealing ring ensures consistent sealing performance under varying load and temperature conditions, preventing contamination and maintaining optimal hydraulic pressure within the transmission system. The ring withstands extreme temperatures and hydraulic pressures in demanding agricultural and industrial applications, so it’ll hold up whether you’re working in winter cold or summer heat.
Good to Know
This is the old-type external seal used on tractors built before November 1995. Installation requires careful handling to prevent damage during assembly—clean all sealing surfaces thoroughly and apply appropriate transmission fluid to aid installation. If you’re tackling a bigger transmission job, this seal is part of the complete rebuild kit 404606.
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