your looking between $1800 to $2200. Canadian $
but before you do that if your having problems shifting out of 2nd into 3rd and you back-up lights do not come on then chances are your problem is the Neutral Safty switch, located on top of the transmission under your air intake.
to test with the van running unplug the wire connector to the switch and drive the van if it runs better replace the switch (install with the trans in neutral)
it only costs about $40.00.
Many people have had trannies replaced and it was not needed