what could the reason be on why car won't start? on 2000 Ford Taurus

starts up but won't go in gear.It's been running fine had no probems. Any advice would be great help, thanks.

2 answers
I think you must mean wont start out, when shifted into gear.? Possible low trans. fluid, restricted fluid flow from dirty filter in trans or broken parts inside of trans. A common problem with this transmission is a stripped input shaft or torque converter splines. Trans. mechanic needed to check it out hands on!
seek a free diag and est from aamco