That is most probably the issue, as I have also replaced mine, but check for snugness in the frame slider/motor mount on both sides (if you have them). If you don't have them check and see if all of the upper motor mounts are tightened up snug and you aren't getting a rattling washer or some unwanted vibration from the motor. Anyhow you should check all of that while you are in there changing out your CCT Lifter.