For a week now all the PRNDS lights keep coming on together for a few seconds, and then off for approx for 10mins. Not really bothered me up till today when i had to call out AA. As i slowed down to a stop a judder starts in the gear stick area, as if i was driving a manual and was stopping without using the clutch. it disapears if i put it into N. it starts ok and ticks over ok. i can drive it away and the judder goes, until i slow down again to stop. this is my first auto and i am completely baffled. any ideas please.