What I want to do is lay down a Drum track and have it sync with the Guitar Track and play at the same Tempo. From what I can gather, your suppose to convert the Audio Track into a Groove Loop.
Groove CLip Looping is for the opposite purpose: to make your audio clip follow the project tempo. To make the project timeline follow the audio tempo with tempo changes, you have basically two options (ignoring Fit Improvisation, which requires a MIDI input device to record a reference track):
1. Use Audiosnap's Set Project from Clip feature.
2. Manually align the timeline to beats you pick out, using Set Measure/Beat At Now.
The first method requires a lot of tweaking to make work well, and I personally find the latter method to be pretty easy and fast so I would recommend it for you as a starting point.
Here's the drill:
0. Trim the front of the clip so that is starts right on the first beat, and Bounce to Clips.
1. Enable snap and drag the audio clip to align the first downbeat transient in the audio with the corresponding beat in the timeline.
2. If that isn't at 1:01:000, use Project > Set Measure/Beat At Now (Shift-N in X1) to "pin" that beat down.
3. With the metronome off, play the project, and count out to the downbeat for measure 9 or 17, and use SM/BAN to set that Measure/Beat to the corresponding audio transient. SONAR will modify the initial tempo to align the timeline to that beat, and insert a matching tempo at that point, locking it in so it doesn't move when you set additional beats later on.
4. If the first beat was not 1:01:000, go into the tempo view and set the initial tempo to match the first tempo that SONAR inserted.
5. Now you've got the overall average tempo approximately matched to the clip, and can enable the metronome on playback and have a listen.
6. Since you didn't record to a click, you'll likely need to set additional beats to bring the timeline into alignment at other points. You can start by doing it every 4 to 8 measures, and see how that sounds, and then even Set every measure if necessary.
7. Even without enabling Audiosnap, you can use the Tab-to-transient feature (Shift-Tab to back up) to set the Now time at each transient you want to snap. The way I often do it is to listen to the playback, stop the transport a moment before the beat I want to snap, tab to that transient, Set it and restart playback. Since the project is roughly aligned, you can also use Ctrl-Page-up/down to jump by measures and Set the nearest transient - just make sure you get the right one.
8. Note that none of this affects how your audio plays back. You're just aligning the timeline to it. But since the M:B:T timeline is the fixed visual reference in SONAR, it will look like your audio is stretching to fit the timeline.