Have a read here: http://www.ford.com/resources/ford/g...angerNov18.pdf
2011 Manual trans 4.0l supercab is rated at 3,200/3,300 so yes.
Your trailer hitch also needs rating upto and above this weight.
Depending on the place you live, local laws may require electric Trailer brakes, they are a good idea anyway, but it may be mandatory.
This requires a trailer brake control in the cab and wiring to the connection at the trailer hitch.
Ranger only weights 3,300lbs so a 3,000lbs trailer will push it around unless you have some braking control