The gear indicator on the dash should sort it out. P R N D 2 L would be for 3-speed, P R N D 3 L would be 4-speed. The 'L's shown here representing Low gear may show up as '1's on some dashboards.
The 2001 Dodge Grand-Caravan has a 4-speed automatic.
The 2004 Dodge Grand-Caravan has a 4-speed automatic.
The 2005 Dodge Grand-Caravan has a 4-speed automatic.
The 2010 Dodge Grand-Caravan has a 4-speed automatic.
The 2002 Dodge Grand-Caravan has a 4-speed automatic.
The 2006 Dodge Grand-Caravan has a 4-speed automatic.
The 2007 Dodge Grand-Caravan has a 4-speed automatic.
The 2009 Dodge Grand-Caravan has a 4-speed shiftable automatic.
The 2014 Dodge Grand-Caravan has a 6-speed shiftable automatic.
The 2012 Dodge Grand-Caravan has a 6-speed shiftable automatic.
The 2013 Dodge Grand-Caravan has a 6-speed shiftable automatic.
The 2011 Dodge Grand-Caravan has a 6-speed shiftable automatic.