If you press the gas pedal down far enough it will downshift into the next lower gear.
Trouble code P0731 means: Incorrect gear ratio, first gear
The car isn't necessarily shifting into neutral its just staying in a lower gear and not shifting to the next gear, check your transmission fluid.
Try a wrecking yard.
is the transmiton
No, The electrical connecters and gear ratios will be different.
faulty speed sensor in the transmission
No, the electrical conections are different, and the gear ratios are different.
3.55 or optional 3.90
There are no warning lights on the gear shift lever.
because your retaining nut came off fifth gear
Could be 3.21, 3.55, 3.92 to 1. Those are the options for a 1996.
Would anyone have a clue what would cause a 1997 Dodge Caravan not to shift out of 1st gear, able to drive...just wont shift medlin317@comcast.net try changing the outputspeed sensor. I have a 2000 caravan with 193000 miles. It was doing same thing, change the sensor and now its work right. I thought I needed a new tranny.