Transmission fluid is fine. Will not shift out of first gear when driving down the road.
Won't shift out of first gear on 1997 Oldsmobile LSS
I have a 97 that is not supercharged and this is a solenoid problem probably located in the transmission. This is not something you can do yourself. Take it to a Transmission shop and have them run a diagnostic test on it and they can tell which one of several solenoids need to be replaced.