trans help

i just bought a 93 caravan and the trans wont shift it shifts into drive and reverse smothly and there is no noise it drove the 1.5 mi home fine at about 30 the vin# is 2b4gh253xpr128359 is this the 4 speed computer controled trans and if so what should i check first the fluid is full and looks good thanks for the help
:banghead:

If the shifter indicator shows PRND3L it is a 4 speed. How many miles on vehicle?
First I would check all electrical connections on transmission and TCM (Passenger side of firewall) for looseness, corroded or broken wires.
Change fluid and filter, make sure you use ATF+4 fluid. Check electrical connector on the solenoid pack for moisture, if moisture present dry and apply electrical grease to help keep out moisture. Check input and output sensors.

Check these links:
http://www.allpar.com/fix/trans.html
http://www.robskorner.org/faqs/Trans/a604trans33.html

Good Luck

its the 4 speed in has 185k im going to drop the pan in the morrning and change fluid and filter and check for metal on the magnet and then check the conections i got it for a steel it still wont be a bad deal if i have to put a trans in it thanks for the info ill let you know how it gos