Q: Car pulls right when breaking.

I have a new problem that just started yesterday I noticed that when applying even a small amount of breaks the car will pull to the right initially then even out. So it's a quick pull, then it breaks evenly until breaks are let go then happens again when re applied. My first thought is air in the break lines but would air on my affect one side?

Also, I recently replaced my intake manifold gaskets. I did it very carefully and put rtv around the water jackets. Everything is back together and the car runs good no leaks except, if I am really hammering on the throttle during a drive I will get just a very, very small amount of coolent that pools on the intake manifold where the water jackets are. If I take a leasiure drive it will be bone dry. This doesn't make sense to me because if there was a leak in the gasket it should leak all the time, and as far as I can tell there is no water in the oil. I don't know what I should do, would a coolant leak stop help with this?
My car has an automatic transmission.

My car has an automatic transmission.