My 1999 plymoth prowler is not shifting either in manual or auto mode, and the speedometer is not working.... The battery had run down over the winter..... was working when I stored it for the winter. This is the first problem I have had.

SOURCE: transmission,and speedometer,check engine light problem

I found the information,as I searched a little further on the Internet,it turns out to be a fairly common problem which is, the speed sensors with the outlet being the most common one to fail but the inlet can also, a relatively cheap fix.

SOURCE: wire diagram 1999 plymoth grand voyager

What section are you needing?

SOURCE: Speedometer/odometer not working, can I get troubleshooting info?

you mean all lights work but speed needle don't move, its a cable problem, maybe broken or come loose from speedo. remove 3 hex screws from chrome trim on gas tank and see if it has come unscrewed, if not undo it and spin front wheel and see if the end of cable turns, it should unless its broken.

SOURCE: my transmission wont shift, the speedometer quit

Most likely your speed sensors are bad, this causes the transmission to seem like its "stuck" in second gear or in "limp" mode. I can also be your TCM (transmission control module). But from your description, it's most likely the speed sensors located on the top of the transmission. Make sure you replace them with an exact replacement are they are not interchangeable.
Hope this helps.

SOURCE: ranger with auto shifts hard from 1st-2nd and then

Shift solenoid or check balls sticking.