Should I return car or let them fix for free?

Also, they must drop transmission to repair. 8Hr. job.

That is your choice. I would never buy a Caravan so if I did buy one and I could return it I would ;) (if that makes sense)

Thanks, at least I know my question's out there. :)

There is no right or wrong. I would take this problem as a warning!

i would return it, consider this a warning shot this vehicle may have future problems.

All of the above sounds good, at least you have options. Exchange or go with warranty work. Good luck