[Carwhiz]

obviously refill trans to full mark, shift through all gears, and see what happens. This transmission is electronic so you should have an appropriate scan tool at your school you can view the specs on the valve body and pressure of trans fluid. On a 97 4L60E, they have been known to have a few problems or two....so you can get a reman trans fairly reasonably priced....Goodwrench offers 3yr/100K warranty, and so does jasper i believe.