Can I get my cars differential fluid checked free? Or free evaluation also? on 1995 Nissan 240SX

I was told differential fluid and possible broken rack and pinion ... Is my car safe to drive? Its a manuel transmission Nissan 240sx se 1995

Asked by for the 1995 Nissan 240SX
if your rack is broken you would have hard time steering it
Its not broke they said it was leaking but my power steering fluid is still full and when Im parked all day no spots under the car?