DOH, escaped driveshaft and not shifting after.

Not sure about A500's, but if it has a front band check the adjustment. I had this happen in my 727 and the band broke, it would shift but not until I slightly let off the throttle. Checked the band adjustment and it just kept screwing in with no tension. Something wasnt right so I dropped the pan and thats when I found the front band in a couple pieces.