I had my manual transmission replaced with a used transmission in October

What is your question?

I moved to pensacola florida from PA and about 3 weeks later the trans started to leak. I've been driving it ever since but I'm very concerned about the fluid level. I'm not seeing anymore small puddles under the car like I was before. I need to drive it to start a job in Fort Lauderdale on 2/27. Can I refill it with gear oil and get the repair work done once I'm down there? It's a 10 hr. drive and I don't want to damage the trans during the trip. Please advise.