Infact we have to turn wheel all the way one direction and then all the way the other (several times usually) before the machine will send enough power to the wheels for it to start moving. There seems to be a little power at the wheels when you first shift into F or R. when you first shift into gear you get a very slight whining as it engages it returns to the typical whining, It is not a slow build up to the engagement. It is the very slight power then all at once its working normally again until i shift out of and then back into gear at which time the process starts all over again. In the past i blew a hose and it behaved like this because it was low on fluid, After adding fluid i would have to go back and forth to get it to engage and would have to do it a little less each time i changed gears until it was normal again. This time i was driving across the gravel lot and the hole thing was shacking when the power died. i turned key Off-On and has had this problem since. It did not do this over time, I have had this machine a long time and it has been a great one with no real problems until now. We will be very greatful for any advise that gets us moving again. Thanks for listening