Are you referring to a light buzzing noise that lasts for about one second when you shift into drive or reverse, and when you come to a stop? That is the Transmission Computer cycling the shift solenoids on and off very quickly to soften the feel of the clutch engagement for comfort. It only applies the the four-speed overdrive transmission, not the three-speed. The four-speed will have a big "0" around the "D" on the shift indicator.
Thursday, May 2nd, 2013 AT 3:46 PM