I use to watch this cartoon when I was a kid. But I can't remember the name of it. It was in the late 80's or early 90's. If I remember right it was a team of 3 people two guys and 1 girl. The flew this big black jet that would tun into a giant robot, and they would fight monster and aleins attacking the earth. If anyone can help out that would be great.

Sounds a bit like Transformers.
Skywarp (G1 - Teletraan I: The Transformers Wiki)

I am not very sure there were 2 men and 1 girl in the episodes I watched,it has been quite a while since I watched them:).