2003 mdx with a stalling problem

Hi

I own a 2003 MDX w/205k miles. The tranny was rebuilt at 150k. The weirdest thing started happening this week. sometimes when i am coming to a stop, the car feels like I am being rear ended and it stalls out. No check engine lights come on. it will start right back up (may take a couple of attempts to get to drive again). A mechanic who specializes in Honad/Acura thinks its the tranny. A tranny guy did a diagnostic and didn't get any codes. (the mechanic could duplicate the problem, the tranny guy couldn't). I would really like to keep the car going, but at this point sinking another 3k for a tranny is not an option. any advice would be appreciated.

thanks