DR Allis , so to get into the working parts of the shuttle , one would unattach the 2 hyd lines and the unbolt the plate and there is nothing attached to the inside of the plate ? so the what all can be done with working thru the inspection hole versus having to split the tractor as just a tractor would not be hard but a 615 that is a major operation. beside changing those shims out what else is usually a problem with the clutch? mine has a slight rattle to it in the neutral position until I start to engage clutch forward or reverse and then it gets a little quieter? I changed the fluid sort of helped maybe a little but still has the rattle like a piece of tin vibrating ?