Automatic/62,000 miles- When I'm doing 45 or higher and let off the gas, the car will jerk. Battery was recently disconnected while installing new radio. Has done this jerking while going through the relearn in the past, but this time its taking longer. I changed the fuel filter last nite and it was dirty. I disconnected the battery again before taking it out today, but it's still doing it. Any thoughts/ideas?