You mean the shift from the first series 200001 - 30xxxx to the second series 400001 - 43xxxx ?
Could be. But almost every Nikkor got a new serial number at the same time in early 2006. it coincided with the announcement from Nikon that they were discontinuing most film cameras, most AIS lenses and many AF lenses designed for film, so they could focus on digital imaging. So I don't think the new serial number is particular to the 17-35 and the change in AFS motor, more likely that is a "silent" update. I always thought the new serial numbers just marked a change in organisation within Nikon, not any real change to the lens lineup. There was one change at this point: before this Nikon used one black screw in the lens mount at 12 o'clock to help the photographer orientate the lens for mounting while looking at the rear. The black screw was discontinued with the new series.