You are correct sir, I do have the hyd cover off. I do not know how much play the lever is suppose to have. The PTO lever was stuck to the diff lever so when you moved either one the other would move also. Between using oil, moving the shaft back and forth and some prying got the pto lever to turn loose, but the diff lock still will not engage. Thought about it after I posted and remembered that I can jack one side up and try to engage when one wheel is off the ground and I should be able to engage if it is working properly. I know both tires will pull, have two nice little ditches in the front yard the wife has not noticed yet. But will check to see if the diff lock will work tomarrow with one tire up in the air. But if still not working how do I get the roll pin out that holds the fork? By the way where can I get a replacement fuse panel for this little tractor? all fuses appear to be blow and no lights work. It is a YM2000 also. When I finish determining the parts I need I was going to order parts manual, owners manual and all parts at the same time.