Could someone please give me some information about my, problem with my John Deere 2355 utility tractor with Sound Guard Cab on it? This tractor uses an internal clutch slave cylinder, that John Deere says, to use DOT 4 brake fluid in. About every 400 hours the seal at the slave cylinder starts leaking and fluid will not stay in the system any longer. This tractor only has 1800 hrs on it and this will be the 4th seal. The tractor has to be broke into every time to do this. Does any one know of a better seal or a better solution or new technology that can solve this problem? Your help will be greatly appreciated, thank you