it will not shift out of 2nd to 3rd overdrive

If there is no diagnostic trouble code showing up, it is less likely for the failure to be caused by a sensor or electrical component. However, it is a 1997 vehicle, and although OBDII is present on this vehicle, there was not as much management present as there is in today's vehicles. So, anything goes, really. The proper steps to take: check the transmission fluid - condition and level. Have a diagnostic test performed on the transmission - see what the results are.

Best to bring it in and let us check it.

Hi if you need a good trans man call and i will give you his number.