MBDOC may have been right about my "lemon" (AMM or Trans?)
 

So the motor has been running rough the past few days. Today, under load, the trans didnt want to downshift, and when it did, it was surging, backing off, then surging again to accelerate. IT feels peppy in town and when RPMs are low, but if you call for anything over 3k of acceleration, strange things happen. I have no CEL. Could this be the AMM?