Daleman,
Your machine is trying to find either low or high gear and its's not able too. I just fixed 1 last week. Here is what you need to do: Turn off the machine disconnect and then:
1) Remove the "Z" axis cover
2) Unbolt the cover support behind the spindle motor, but you dont have to remove it from the machine. Just swing it out of the way. Be cautious, not to damage the wire track.
3) Find and unscrew the 2 copper 1/8" lines at the valve manifold, that go to the transmission gearbox.
4) Remove the copper adaptors at the manifold. There is a .010" hole in both adaptors.
5) Drill the .010" hole out to .030", clean and re-aasemble the lines to the manifold.
6) Remove and clean the double solenoid valve on the right side of the manifold block with contact cleaner. DO NOT LOSE THE VALVE GASKET.
7) Reassemble the valve and cover support bracket.
8) Turn on the disconnect, Power restart and home out, then try low gear speeds, and then high gear speeds.
9) Re-assemble the "Z" axis cover.
Hope this helps.
Just a good ol' boy, never meanin' no harm.
Joe