2003 dodge neon PO700 (tcm)

You dont have to pull the tranny to fix this. Some so called "experts" on here shouldnt be giving advice if they dont know. The solenoid pack is located in the front the transmission just below the air filter and in front of the input speed sensor you just replaced. Unbolt the connector with a 10mm socket then the bolts connecting to the tranny. Replace with a new one 140 bux or close(get a new one). Installation is vice versa. Easy fix for any person who is mechanically inclined. Always get a second or third opinion when asking a thousand dollar question on any website. Some people think they know....but they dont.

TCM codes usually mean that the actual computer in the transmission is going out. The tranny usually need to be removed from the Neon because to get to the TCM you must dissasemble the pump, torque converter, etc to get to it. From my experience on sending several Neons out to a transmission shop this seems to be the culprit. The Not shifting out of first gear is what Chrysler Techs like to call "Limp Mode" so one could "limp" it into the shop...good luck with this.

Put your old parts back in, seems as you had less problems then........I am really thinking that you messed something up while changing your sensors.....maybe you can locate and fix this problem? think about it, it had a problem, you tried to fix and now it has many problems.......take three steps back..