Number one issue with these transmissions is caused by debris built up on top of them. They have external mechanisms up top that you can't see without a mirror that work the variators. If any debris at all gets on top of them, it can get wedged in the linkages and the trans will act weird. It only takes one piece of a stick to cause it. Best thing to do is get a mirror and look across the top of the transmission and make sure it's clean and clear. Another spot to check is at the very back. The rear variator needs to move up and down. There is a gap between it and body of the transmission. Make sure nothing wedged in that gap as well. You could also have an issue with the front variator, but check for debris first. I'm so glad this transmission is no longer used by Deere! See Deere's diagnostics below...