What's the reason for code p0700..p0701,p0702,p0703,p0704

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I just got a PT cruiser and the tranny wines when you put it in gear. But as long as it's winning it moves ,when it stops winning it wont move. I got the engine code p0700, then p0701,p0702,p0703,p0704 for incorrect ratio. Do I drop the pan and change the filter and oil or do I drop the tranny and replace it? It almost sound like it's starving for fluid like a power steering pump does. The car has 120,000 on it