When your Dual Power transmission starts acting up with hard shifts or slow engagement between ranges, there's a good chance the shaft sealing ring inside is letting hydraulic pressure escape. This little ring might look simple, but it's critical for maintaining the precise hydraulic pressure your Dual Power system needs to shift smoothly under load. A worn seal means lost pressure, which means sluggish range changes right when you need reliable power. Key Features Maintains proper hydraulic pressure in the Dual Power transmission system for smooth range shifting Engineered to handle the high-pressure hydraulic conditions in Ford's Dual Power units Direct replacement seal that restores original transmission performance and reliability Built to withstand the heat and pressure cycles of hard-working transmission systems Built for Real Farm Work This sealing ring is designed for Ford New Holland 40 series tractors like the 5640 through 8340, plus TS series models including the TS100, TS110, and TS115 . These are tractors that handle serious work - from heavy tillage and planting to hay operations and loader work around the farm. The Dual Power system gives you two speed ranges in every gear, so you can match your power and ground speed perfectly to the job at hand. Made to Last This sealing ring is manufactured to withstand extreme temperatures and hydraulic pressures in demanding agricultural applications . It's built to handle the constant pressure changes that happen every time you shift between high and low range, plus the heat that builds up during long days of hard work. Good to Know Professional installation is recommended due to the complexity of transmission disassembly and hydraulic system bleeding procedures . This isn't a quick roadside fix - you'll need to get into the transmission housing to replace this seal. While you're in there, it's smart to check other related seals and consider a complete system service if it's been a while.