Ford Australia had a problem with BA and BF model Falcon's in that when the braking system was assembled, the brake pedal has a rod into the vacuum booster that was adjusted "too long" which meant the that there was always some residual brake pressure holding the pads against the brake rotor, and this was felt by the driver as a slight "pulsing" in the steering. It also meant a very slight pulsing with light pedal pressures on the brake pedal (felt thru the pedal) which disappeared with firm or heavy brake-pedal pressure.
Ford also determined that left-foot brakers who habitually held their left foot "over" the brake pedal sometimes rested their foot on the pedal which resulted in a similar situation.
The only reason I make these observations is the the OP drives a 7AT and I am wondering whether (s)he is a left-foot braker and may be experiencing something like the above circumstances.
The cure for the former was to remove the booster unit and adjust the rod from the brake pedal to shorten it by a couple of mm. I took a peek and my car at lunchtime (mine is a 6MT but arguably should be similar to 7AT) and I do not think this is likely to be a problem, so I wonder, "if" the OP is a left-foot braker, whether making sure that the left foot is always clear of the pedal will make a difference.
This may be a complete WOFTAM and absolute mis-direction, but one never knows .....
RB
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