Thanks for your response.
Yes, I created the drum track after the guitar was recorded. I would typically record the drums first but this is not my song, just producing it for a guitar/singer/writer. He wanted to hear some drum beats that I recorded and decide which he liked best. It is sometimes hard to get him back in for re-recording so I am trying to skip a step.
I tried the Auto Snap but could not get it to work, likely my lack of full understanding of this version of Sonar. I will try Melodyne.