Vapor coming out of the transmission dipstick?

Have a stage 3 4l60e. I didn’t notice the dipstick vapor until yesterday, it shifts perfectly on regular rpms high rpms it kind of takes a split second to kick to 3rd gear, checked the transmission temperature and it was at the end of the loop, but I filled it up to the proper level while on the proper temperature and it still smoking but not as bad as before. should I put a bigger transmission cooler since I still have the stock one? I also have a 2800 stall since I have a stage 2 cam.