[doitbby]

i had this same problem and found out,after numerous times in to the dealership, that it was the transmission mounts that had gone bad. these mounts are meant to keep the tranny from rising upon acceleration. i installed prg's traction bars and the clunk was gone, but i knew it wasn't fixed. this just goes to show how well the traction bars work. they actually kept the tranny from rising somehow. a few days later the mounts were replaced and fixed and i was able to hammer on the accelerator with no doubts. prg is the best by far.