Hydro or wheel motor problem?

[McFarland_Lawn_Care]

Hi folks! One of my Toro Zmasters is starting to lose it's control on the sticks. When I go to slow down, the control is a little sloppy and the when the tire does slow down it kinda does it suddenly and sometimes skids a little for no apparent reason. I was just curious if those of you have replaced or repaired wheel motors and hydros...what are the symptoms? and how can you tell what the problem is? Thanks so much!

Jason