Dodge Grand Caravan Forum : “when should i change my transmission fluid”

every 60,000 miles.

Yes, the manufacturer suggested may be 60K miles, HOWEVER, chryslers are notorious for blowing transmissions especially if you tow anything behind them.  I would highly suggest doing a fluid change at a bare minimum of every 2 years/24K miles if you dont tow with yours or every year/ 15K miles if you do tow with them.  Keeping the fluid fresh and clean is the best way to save the transmission and is much cheaper than having to replace a burned up transmission.  
Talk to anyone that has owned Chrysler minivans overy the years and they will all just about say the same thing.  

Actually they recommend replacing fluid and filter every 30,000 miles. Don't just do the crappy flush machine you should drop the pan and replace fluid and filter.