If you have your frame rates straight -- and I have no reason to doubt it -- forget the audio. Just render out the video in a lossless codec, and use it in Premiere. You should have absolutely NO problems.
I import clips with lip-sync audio into AE all the time and never render out the audio. Never a problem. Audio is NOT AE's strong suit, and it stands to reason: it's a video-centered application.
Thanks for the quick reply Dave,
I will try this out and report back.
I've always been in the habbit of using Quick Time with Apple Animation codec set to 100% as a lossless codec for these types of situations. Would you suggest this codec or another one perhaps?
Yup, I've got a new lossless recommendation: Quicktime's PNG codec. It's 10-bit, supports alpha channels, and generally has smaller file sizes than Animation.
If you also have FCP 7 on your machine, you could also give ProRes 422 a whirl. Good codec. Not lossless, but you have to re-render something six times over before you see any kind of image degradation... and for the file size, that's approaching the realm of the magical.