Clicking noise at low speeds

[cdubick]

So after researching other forums I decided to create my own. They weren't describing the noise I'm hearing. I drive a 13' Edge sport and around town I'm usually cruising with the paddle shifters in sport mode. The noise isn't noticeable in sport mode because I'm usually in 3rd or 4th gear. When I put it into drive and I drive down the street it's only noticeable and low rpm's when the automatic transmission shifts itself into a higher gear. It's faint but loud enough where I can hear it driving. 30mph is usually how fast I drive and in drive it makes a click noise, no other way to describe it other than a click. It's repeatedly clicking and it's only in drive because it wants to be in s higher gear. My oil change is coming up in about less than a month. I topped of my oil and I still hear it. I don't think it's my cv joint because it's not a constant noise. It's only at a low rpm. I don't always wanna drive in sport but when it's in drive it's unsettling