"Gearbox Fault" light just went on in my '05 Vander Plas with 70K miles. Any suggestions on how to manage this item? Is this light telling me I'll need a new transmission soon? Is the dealer the best place to go? I'm seeing a lot of TCM posts, and possible moisture from leaking tubes.

 

How old is your battery?

 

No idea, Mark. Is that a potential cause for concern?

 

If it's the original battery, that would be a concern. Autozone can check it for free.
Then you need to get your codes read, that will give you a better idea of where to start.