Back with an update.
It finally became unusable. $925 later, I had a new transmission on one side. The dealer explained that the other side was getting weak, and made some adjustments to make it steer right, except just not mow as fast at top speed. He also said that the transmissions were the common cause of failure for the ZTs, and that everything else, including the engine, seemed to last a long time.
Maybe that was a sales pitch - I see another $925 coming some time next year, when the other side goes.
It finally became unusable. $925 later, I had a new transmission on one side. The dealer explained that the other side was getting weak, and made some adjustments to make it steer right, except just not mow as fast at top speed. He also said that the transmissions were the common cause of failure for the ZTs, and that everything else, including the engine, seemed to last a long time.
Maybe that was a sales pitch - I see another $925 coming some time next year, when the other side goes.