I recently put my motor back in and along with that the trans goes back on. When I leave the car for a bit the pedal gets a little spongy. Couple pumps and its back to normal but I also get a whine/metal on metal sound when Im putting the car into first and reverse. Do I just have some stubborn air in the lines? I've pumped the fucker a bunch with the cap off with no improvement. Seems like when I drive a good distance or pump the pedal you can hear the noise as much.